C#: Begin move to .NET Core

We're targeting .NET 5 for now to make development easier while
.NET 6 is not yet released.

TEMPORARY REGRESSIONS
---------------------

Assembly unloading is not implemented yet. As such, many Godot
resources are leaked at exit. This will be re-implemented later
together with assembly hot-reloading.

27 files changed, 1315 insertions, 583 deletions

diff --git a/modules/mono/glue/GodotSharp/GodotPlugins/GodotPlugins.csproj b/modules/mono/glue/GodotSharp/GodotPlugins/GodotPlugins.csproj
new file mode 100644
index 0000000000..38cd2ece4e
--- /dev/null
+++ b/modules/mono/glue/GodotSharp/GodotPlugins/GodotPlugins.csproj
@@ -0,0 +1,17 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <TargetFramework>net5.0</TargetFramework>
+        <LangVersion>9</LangVersion>
+        <Nullable>enable</Nullable>
+        <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
+
+        <!-- To generate the .runtimeconfig.json file-->
+        <EnableDynamicLoading>true</EnableDynamicLoading>
+    </PropertyGroup>
+
+    <ItemGroup>
+      <ProjectReference Include="..\GodotSharp\GodotSharp.csproj" />
+    </ItemGroup>
+
+</Project>
diff --git a/modules/mono/glue/GodotSharp/GodotPlugins/Main.cs b/modules/mono/glue/GodotSharp/GodotPlugins/Main.cs
new file mode 100644
index 0000000000..9f938373c4
--- /dev/null
+++ b/modules/mono/glue/GodotSharp/GodotPlugins/Main.cs
@@ -0,0 +1,197 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Reflection;
+using System.Runtime.InteropServices;
+using System.Runtime.Loader;
+using Godot.NativeInterop;
+
+namespace GodotPlugins
+{
+    public static class Main
+    {
+        private static readonly List<AssemblyName> SharedAssemblies = new();
+        private static readonly Assembly CoreApiAssembly = typeof(Godot.Object).Assembly;
+        private static Assembly? _editorApiAssembly;
+
+        private static readonly AssemblyLoadContext MainLoadContext =
+            AssemblyLoadContext.GetLoadContext(Assembly.GetExecutingAssembly()) ??
+            AssemblyLoadContext.Default;
+
+        // Right now we do it this way for simplicity as hot-reload is disabled. It will need to be changed later.
+        [UnmanagedCallersOnly]
+        internal static unsafe godot_bool Initialize(godot_bool editorHint,
+            PluginsCallbacks* pluginsCallbacks, Godot.Bridge.ManagedCallbacks* managedCallbacks)
+        {
+            try
+            {
+                SharedAssemblies.Add(CoreApiAssembly.GetName());
+
+                if (editorHint.ToBool())
+                {
+                    _editorApiAssembly = Assembly.Load("GodotSharpEditor");
+                    SharedAssemblies.Add(_editorApiAssembly.GetName());
+                }
+
+                NativeLibrary.SetDllImportResolver(CoreApiAssembly, OnResolveDllImport);
+
+                *pluginsCallbacks = new()
+                {
+                    LoadProjectAssemblyCallback = &LoadProjectAssembly,
+                    LoadToolsAssemblyCallback = &LoadToolsAssembly,
+                };
+
+                *managedCallbacks = Godot.Bridge.ManagedCallbacks.Create();
+
+                return godot_bool.True;
+            }
+            catch (Exception e)
+            {
+                Console.Error.WriteLine(e);
+                *pluginsCallbacks = default;
+                *managedCallbacks = default;
+                return false.ToGodotBool();
+            }
+        }
+
+        [StructLayout(LayoutKind.Sequential)]
+        internal struct PluginsCallbacks
+        {
+            public unsafe delegate* unmanaged<char*, godot_bool> LoadProjectAssemblyCallback;
+            public unsafe delegate* unmanaged<char*, IntPtr> LoadToolsAssemblyCallback;
+        }
+
+        [UnmanagedCallersOnly]
+        internal static unsafe godot_bool LoadProjectAssembly(char* nAssemblyPath)
+        {
+            try
+            {
+                string assemblyPath = new(nAssemblyPath);
+
+                var assembly = LoadPlugin(assemblyPath);
+
+                var method = CoreApiAssembly.GetType("Godot.Bridge.ScriptManagerBridge")?
+                    .GetMethod("LookupScriptsInAssembly",
+                        BindingFlags.Static | BindingFlags.NonPublic | BindingFlags.Public);
+
+                if (method == null)
+                {
+                    throw new MissingMethodException("Godot.Bridge.ScriptManagerBridge",
+                        "LookupScriptsInAssembly");
+                }
+
+                method.Invoke(null, new object[] { assembly });
+
+                return godot_bool.True;
+            }
+            catch (Exception e)
+            {
+                Console.Error.WriteLine(e);
+                return false.ToGodotBool();
+            }
+        }
+
+        [UnmanagedCallersOnly]
+        internal static unsafe IntPtr LoadToolsAssembly(char* nAssemblyPath)
+        {
+            try
+            {
+                string assemblyPath = new(nAssemblyPath);
+
+                if (_editorApiAssembly == null)
+                    throw new InvalidOperationException("The Godot editor API assembly is not loaded");
+
+                var assembly = LoadPlugin(assemblyPath);
+
+                NativeLibrary.SetDllImportResolver(assembly, OnResolveDllImport);
+
+                var method = assembly.GetType("GodotTools.GodotSharpEditor")?
+                    .GetMethod("InternalCreateInstance",
+                        BindingFlags.Static | BindingFlags.NonPublic | BindingFlags.Public);
+
+                if (method == null)
+                {
+                    throw new MissingMethodException("GodotTools.GodotSharpEditor",
+                        "InternalCreateInstance");
+                }
+
+                return (IntPtr?)method.Invoke(null, null) ?? IntPtr.Zero;
+            }
+            catch (Exception e)
+            {
+                Console.Error.WriteLine(e);
+                return IntPtr.Zero;
+            }
+        }
+
+        private static Assembly LoadPlugin(string assemblyPath)
+        {
+            string assemblyName = Path.GetFileNameWithoutExtension(assemblyPath);
+
+            var sharedAssemblies = new List<string>();
+
+            foreach (var sharedAssembly in SharedAssemblies)
+            {
+                string? sharedAssemblyName = sharedAssembly.Name;
+                if (sharedAssemblyName != null)
+                    sharedAssemblies.Add(sharedAssemblyName);
+            }
+
+            var loadContext = new PluginLoadContext(assemblyPath, sharedAssemblies, MainLoadContext);
+            return loadContext.LoadFromAssemblyName(new AssemblyName(assemblyName));
+        }
+
+        public static IntPtr OnResolveDllImport(string libraryName, Assembly assembly, DllImportSearchPath? searchPath)
+        {
+            if (libraryName == "__Internal")
+            {
+                if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
+                {
+                    return Win32.GetModuleHandle(IntPtr.Zero);
+                }
+                else if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
+                {
+                    return Linux.dlopen(IntPtr.Zero, Linux.RTLD_LAZY);
+                }
+                else if (RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
+                {
+                    return MacOS.dlopen(IntPtr.Zero, MacOS.RTLD_LAZY);
+                }
+            }
+
+            return IntPtr.Zero;
+        }
+
+        // ReSharper disable InconsistentNaming
+        private static class MacOS
+        {
+            private const string SystemLibrary = "/usr/lib/libSystem.dylib";
+
+            public const int RTLD_LAZY = 1;
+
+            [DllImport(SystemLibrary)]
+            public static extern IntPtr dlopen(IntPtr path, int mode);
+        }
+
+        private static class Linux
+        {
+            // libdl.so was resulting in DllNotFoundException, for some reason...
+            // libcoreclr.so should work with both CoreCLR and the .NET Core version of Mono.
+            private const string SystemLibrary = "libcoreclr.so";
+
+            public const int RTLD_LAZY = 1;
+
+            [DllImport(SystemLibrary)]
+            public static extern IntPtr dlopen(IntPtr path, int mode);
+        }
+
+        private static class Win32
+        {
+            private const string SystemLibrary = "Kernel32.dll";
+
+            [DllImport(SystemLibrary)]
+            public static extern IntPtr GetModuleHandle(IntPtr lpModuleName);
+        }
+        // ReSharper restore InconsistentNaming
+    }
+}
diff --git a/modules/mono/glue/GodotSharp/GodotPlugins/PluginLoadContext.cs b/modules/mono/glue/GodotSharp/GodotPlugins/PluginLoadContext.cs
new file mode 100644
index 0000000000..1b969716aa
--- /dev/null
+++ b/modules/mono/glue/GodotSharp/GodotPlugins/PluginLoadContext.cs
@@ -0,0 +1,61 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Reflection;
+using System.Runtime.Loader;
+
+namespace GodotPlugins
+{
+    public class PluginLoadContext : AssemblyLoadContext
+    {
+        private readonly AssemblyDependencyResolver _resolver;
+        private readonly ICollection<string> _sharedAssemblies;
+        private readonly AssemblyLoadContext _mainLoadContext;
+
+        public PluginLoadContext(string pluginPath, ICollection<string> sharedAssemblies,
+            AssemblyLoadContext mainLoadContext)
+        {
+            Console.WriteLine(pluginPath);
+            Console.Out.Flush();
+            _resolver = new AssemblyDependencyResolver(pluginPath);
+            _sharedAssemblies = sharedAssemblies;
+            _mainLoadContext = mainLoadContext;
+        }
+
+        protected override Assembly? Load(AssemblyName assemblyName)
+        {
+            if (assemblyName.Name == null)
+                return null;
+
+            if (_sharedAssemblies.Contains(assemblyName.Name))
+                return _mainLoadContext.LoadFromAssemblyName(assemblyName);
+
+            string? assemblyPath = _resolver.ResolveAssemblyToPath(assemblyName);
+            if (assemblyPath != null)
+            {
+                // Load in memory to prevent locking the file
+                using var assemblyFile = File.Open(assemblyPath, FileMode.Open, FileAccess.Read, FileShare.Read);
+                string pdbPath = Path.ChangeExtension(assemblyPath, ".pdb");
+
+                if (File.Exists(pdbPath))
+                {
+                    using var pdbFile = File.Open(pdbPath, FileMode.Open, FileAccess.Read, FileShare.Read);
+                    return LoadFromStream(assemblyFile, pdbFile);
+                }
+
+                return LoadFromStream(assemblyFile);
+            }
+
+            return null;
+        }
+
+        protected override IntPtr LoadUnmanagedDll(string unmanagedDllName)
+        {
+            string? libraryPath = _resolver.ResolveUnmanagedDllToPath(unmanagedDllName);
+            if (libraryPath != null)
+                return LoadUnmanagedDllFromPath(libraryPath);
+
+            return IntPtr.Zero;
+        }
+    }
+}
diff --git a/modules/mono/glue/GodotSharp/GodotSharp.sln b/modules/mono/glue/GodotSharp/GodotSharp.sln
index 4896d0a07d..fc4e6e91f1 100644
--- a/modules/mono/glue/GodotSharp/GodotSharp.sln
+++ b/modules/mono/glue/GodotSharp/GodotSharp.sln
@@ -4,6 +4,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "GodotSharp", "GodotSharp\Go
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "GodotSharpEditor", "GodotSharpEditor\GodotSharpEditor.csproj", "{8FBEC238-D944-4074-8548-B3B524305905}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "GodotPlugins", "GodotPlugins\GodotPlugins.csproj", "{944B77DB-497B-47F5-A1E3-81C35E3E9D4E}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 	Debug|Any CPU = Debug|Any CPU
@@ -18,5 +20,9 @@ Global
 		{8FBEC238-D944-4074-8548-B3B524305905}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{8FBEC238-D944-4074-8548-B3B524305905}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{8FBEC238-D944-4074-8548-B3B524305905}.Release|Any CPU.Build.0 = Release|Any CPU
+		{944B77DB-497B-47F5-A1E3-81C35E3E9D4E}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{944B77DB-497B-47F5-A1E3-81C35E3E9D4E}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{944B77DB-497B-47F5-A1E3-81C35E3E9D4E}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{944B77DB-497B-47F5-A1E3-81C35E3E9D4E}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 EndGlobal
diff --git a/modules/mono/glue/GodotSharp/GodotSharp/Core/Array.cs b/modules/mono/glue/GodotSharp/GodotSharp/Core/Array.cs
index a2a97e0a3e..2aa2ece803 100644
--- a/modules/mono/glue/GodotSharp/GodotSharp/Core/Array.cs
+++ b/modules/mono/glue/GodotSharp/GodotSharp/Core/Array.cs
@@ -95,7 +95,7 @@ namespace Godot.Collections
         public Array Duplicate(bool deep = false)
         {
             godot_array newArray;
-            NativeFuncs.godotsharp_array_duplicate(ref NativeValue, deep, out newArray);
+            NativeFuncs.godotsharp_array_duplicate(ref NativeValue, deep.ToGodotBool(), out newArray);
             return CreateTakingOwnershipOfDisposableValue(newArray);
         }
 
diff --git a/modules/mono/glue/GodotSharp/GodotSharp/Core/Bridge/CSharpInstanceBridge.cs b/modules/mono/glue/GodotSharp/GodotSharp/Core/Bridge/CSharpInstanceBridge.cs
index 16fde2a900..db27989bdb 100644
--- a/modules/mono/glue/GodotSharp/GodotSharp/Core/Bridge/CSharpInstanceBridge.cs
+++ b/modules/mono/glue/GodotSharp/GodotSharp/Core/Bridge/CSharpInstanceBridge.cs
@@ -6,118 +6,167 @@ namespace Godot.Bridge
 {
     internal static class CSharpInstanceBridge
     {
-        private static unsafe void Call(IntPtr godotObjectGCHandle, godot_string_name* method,
-            godot_variant** args, int argCount, godot_variant_call_error* ref_callError, godot_variant* r_ret)
+        [UnmanagedCallersOnly]
+        internal static unsafe godot_bool Call(IntPtr godotObjectGCHandle, godot_string_name* method,
+            godot_variant** args, int argCount, godot_variant_call_error* refCallError, godot_variant* ret)
         {
-            // Performance is not critical here as this will be replaced with source generators.
-            var godotObject = (Object)GCHandle.FromIntPtr(godotObjectGCHandle).Target;
-
-            if (godotObject == null)
+            try
             {
-                *r_ret = default;
-                (*ref_callError).error = godot_variant_call_error_error.GODOT_CALL_ERROR_CALL_ERROR_INSTANCE_IS_NULL;
-                return;
+                // Performance is not critical here as this will be replaced with source generators.
+                var godotObject = (Object)GCHandle.FromIntPtr(godotObjectGCHandle).Target;
+
+                if (godotObject == null)
+                {
+                    *ret = default;
+                    (*refCallError).error = godot_variant_call_error_error.GODOT_CALL_ERROR_CALL_ERROR_INSTANCE_IS_NULL;
+                    return false.ToGodotBool();
+                }
+
+                using godot_string dest = default;
+                NativeFuncs.godotsharp_string_name_as_string(&dest, method);
+                string methodStr = Marshaling.mono_string_from_godot(dest);
+
+                bool methodInvoked = godotObject.InternalGodotScriptCall(methodStr, args, argCount, out godot_variant retValue);
+
+                if (!methodInvoked)
+                {
+                    *ret = default;
+                    // This is important, as it tells Object::call that no method was called.
+                    // Otherwise, it would prevent Object::call from calling native methods.
+                    (*refCallError).error = godot_variant_call_error_error.GODOT_CALL_ERROR_CALL_ERROR_INVALID_METHOD;
+                    return false.ToGodotBool();
+                }
+
+                *ret = retValue;
+                return true.ToGodotBool();
             }
-
-            using godot_string dest = default;
-            NativeFuncs.godotsharp_string_name_as_string(&dest, method);
-            string methodStr = Marshaling.mono_string_from_godot(dest);
-
-            bool methodInvoked = godotObject.InternalGodotScriptCall(methodStr, args, argCount, out godot_variant outRet);
-
-            if (!methodInvoked)
+            catch (Exception e)
             {
-                *r_ret = default;
-                // This is important, as it tells Object::call that no method was called.
-                // Otherwise, it would prevent Object::call from calling native methods.
-                (*ref_callError).error = godot_variant_call_error_error.GODOT_CALL_ERROR_CALL_ERROR_INVALID_METHOD;
-                return;
+                ExceptionUtils.DebugPrintUnhandledException(e);
+                *ret = default;
+                return false.ToGodotBool();
             }
-
-            *r_ret = outRet;
         }
 
-        private static unsafe bool Set(IntPtr godotObjectGCHandle, godot_string_name* name, godot_variant* value)
+        [UnmanagedCallersOnly]
+        internal static unsafe godot_bool Set(IntPtr godotObjectGCHandle, godot_string_name* name, godot_variant* value)
         {
-            // Performance is not critical here as this will be replaced with source generators.
-            var godotObject = (Object)GCHandle.FromIntPtr(godotObjectGCHandle).Target;
+            try
+            {
+                // Performance is not critical here as this will be replaced with source generators.
+                var godotObject = (Object)GCHandle.FromIntPtr(godotObjectGCHandle).Target;
 
-            if (godotObject == null)
-                throw new InvalidOperationException();
+                if (godotObject == null)
+                    throw new InvalidOperationException();
 
-            var nameManaged = StringName.CreateTakingOwnershipOfDisposableValue(
-                NativeFuncs.godotsharp_string_name_new_copy(name));
+                var nameManaged = StringName.CreateTakingOwnershipOfDisposableValue(
+                    NativeFuncs.godotsharp_string_name_new_copy(name));
 
-            if (godotObject.InternalGodotScriptSetFieldOrPropViaReflection(nameManaged.ToString(), value))
-                return true;
+                if (godotObject.InternalGodotScriptSetFieldOrPropViaReflection(nameManaged.ToString(), value))
+                    return true.ToGodotBool();
 
-            object valueManaged = Marshaling.variant_to_mono_object(value);
+                object valueManaged = Marshaling.variant_to_mono_object(value);
 
-            return godotObject._Set(nameManaged, valueManaged);
+                return godotObject._Set(nameManaged, valueManaged).ToGodotBool();
+            }
+            catch (Exception e)
+            {
+                ExceptionUtils.DebugPrintUnhandledException(e);
+                return false.ToGodotBool();
+            }
         }
 
-        private static unsafe bool Get(IntPtr godotObjectGCHandle, godot_string_name* name, godot_variant* r_retValue)
+        [UnmanagedCallersOnly]
+        internal static unsafe godot_bool Get(IntPtr godotObjectGCHandle, godot_string_name* name,
+            godot_variant* outRet)
         {
-            // Performance is not critical here as this will be replaced with source generators.
-            var godotObject = (Object)GCHandle.FromIntPtr(godotObjectGCHandle).Target;
+            try
+            {
+                // Performance is not critical here as this will be replaced with source generators.
+                var godotObject = (Object)GCHandle.FromIntPtr(godotObjectGCHandle).Target;
 
-            if (godotObject == null)
-                throw new InvalidOperationException();
+                if (godotObject == null)
+                    throw new InvalidOperationException();
 
-            var nameManaged = StringName.CreateTakingOwnershipOfDisposableValue(
-                NativeFuncs.godotsharp_string_name_new_copy(name));
+                var nameManaged = StringName.CreateTakingOwnershipOfDisposableValue(
+                    NativeFuncs.godotsharp_string_name_new_copy(name));
 
-            if (godotObject.InternalGodotScriptGetFieldOrPropViaReflection(nameManaged.ToString(),
-                out godot_variant outRet))
-            {
-                *r_retValue = outRet;
-                return true;
-            }
+                if (godotObject.InternalGodotScriptGetFieldOrPropViaReflection(nameManaged.ToString(),
+                    out godot_variant outRetValue))
+                {
+                    *outRet = outRetValue;
+                    return true.ToGodotBool();
+                }
 
-            object ret = godotObject._Get(nameManaged);
+                object ret = godotObject._Get(nameManaged);
 
-            if (ret == null)
+                if (ret == null)
+                {
+                    *outRet = default;
+                    return false.ToGodotBool();
+                }
+
+                *outRet = Marshaling.mono_object_to_variant(ret);
+                return true.ToGodotBool();
+            }
+            catch (Exception e)
             {
-                *r_retValue = default;
-                return false;
+                ExceptionUtils.DebugPrintUnhandledException(e);
+                *outRet = default;
+                return false.ToGodotBool();
             }
-
-            *r_retValue = Marshaling.mono_object_to_variant(ret);
-            return true;
         }
 
-        private static void CallDispose(IntPtr godotObjectGCHandle, bool okIfNull)
+        [UnmanagedCallersOnly]
+        internal static void CallDispose(IntPtr godotObjectGCHandle, godot_bool okIfNull)
         {
-            var godotObject = (Object)GCHandle.FromIntPtr(godotObjectGCHandle).Target;
+            try
+            {
+                var godotObject = (Object)GCHandle.FromIntPtr(godotObjectGCHandle).Target;
 
-            if (okIfNull)
-                godotObject?.Dispose();
-            else
-                godotObject!.Dispose();
+                if (okIfNull.ToBool())
+                    godotObject?.Dispose();
+                else
+                    godotObject!.Dispose();
+            }
+            catch (Exception e)
+            {
+                ExceptionUtils.DebugPrintUnhandledException(e);
+            }
         }
 
-        private static unsafe void CallToString(IntPtr godotObjectGCHandle, godot_string* r_res, bool* r_valid)
+        [UnmanagedCallersOnly]
+        internal static unsafe void CallToString(IntPtr godotObjectGCHandle, godot_string* outRes, godot_bool* outValid)
         {
-            var self = (Object)GCHandle.FromIntPtr(godotObjectGCHandle).Target;
-
-            if (self == null)
+            try
             {
-                *r_res = default;
-                *r_valid = false;
-                return;
+                var self = (Object)GCHandle.FromIntPtr(godotObjectGCHandle).Target;
+
+                if (self == null)
+                {
+                    *outRes = default;
+                    *outValid = false.ToGodotBool();
+                    return;
+                }
+
+                var resultStr = self.ToString();
+
+                if (resultStr == null)
+                {
+                    *outRes = default;
+                    *outValid = false.ToGodotBool();
+                    return;
+                }
+
+                *outRes = Marshaling.mono_string_to_godot(resultStr);
+                *outValid = true.ToGodotBool();
             }
-
-            var resultStr = self.ToString();
-
-            if (resultStr == null)
+            catch (Exception e)
             {
-                *r_res = default;
-                *r_valid = false;
-                return;
+                ExceptionUtils.DebugPrintUnhandledException(e);
+                *outRes = default;
+                *outValid = false.ToGodotBool();
             }
-
-            *r_res = Marshaling.mono_string_to_godot(resultStr);
-            *r_valid = true;
         }
     }
 }
diff --git a/modules/mono/glue/GodotSharp/GodotSharp/Core/Bridge/GCHandleBridge.cs b/modules/mono/glue/GodotSharp/GodotSharp/Core/Bridge/GCHandleBridge.cs
index aa9e434b07..c6f2e8f77d 100644
--- a/modules/mono/glue/GodotSharp/GodotSharp/Core/Bridge/GCHandleBridge.cs
+++ b/modules/mono/glue/GodotSharp/GodotSharp/Core/Bridge/GCHandleBridge.cs
@@ -1,11 +1,22 @@
 using System;
 using System.Runtime.InteropServices;
+using Godot.NativeInterop;
 
 namespace Godot.Bridge
 {
     internal static class GCHandleBridge
     {
-        private static void FreeGCHandle(IntPtr gcHandlePtr)
-            => GCHandle.FromIntPtr(gcHandlePtr).Free();
+        [UnmanagedCallersOnly]
+        internal static void FreeGCHandle(IntPtr gcHandlePtr)
+        {
+            try
+            {
+                GCHandle.FromIntPtr(gcHandlePtr).Free();
+            }
+            catch (Exception e)
+            {
+                ExceptionUtils.DebugPrintUnhandledException(e);
+            }
+        }
     }
 }
diff --git a/modules/mono/glue/GodotSharp/GodotSharp/Core/Bridge/ManagedCallbacks.cs b/modules/mono/glue/GodotSharp/GodotSharp/Core/Bridge/ManagedCallbacks.cs
new file mode 100644
index 0000000000..1d19376cdd
--- /dev/null
+++ b/modules/mono/glue/GodotSharp/GodotSharp/Core/Bridge/ManagedCallbacks.cs
@@ -0,0 +1,72 @@
+using System;
+using System.Runtime.InteropServices;
+using Godot.NativeInterop;
+
+namespace Godot.Bridge
+{
+    [StructLayout(LayoutKind.Sequential)]
+    internal unsafe struct ManagedCallbacks
+    {
+        // @formatter:off
+        public delegate* unmanaged<IntPtr, godot_variant**, int, godot_bool*, void> SignalAwaiter_SignalCallback;
+        public delegate* unmanaged<IntPtr, godot_variant**, uint, godot_variant*, void> DelegateUtils_InvokeWithVariantArgs;
+        public delegate* unmanaged<IntPtr, IntPtr, godot_bool> DelegateUtils_DelegateEquals;
+        public delegate* unmanaged<void> ScriptManagerBridge_FrameCallback;
+        public delegate* unmanaged<godot_string_name*, IntPtr, IntPtr> ScriptManagerBridge_CreateManagedForGodotObjectBinding;
+        public delegate* unmanaged<IntPtr, IntPtr, godot_variant**, int, godot_bool> ScriptManagerBridge_CreateManagedForGodotObjectScriptInstance;
+        public delegate* unmanaged<IntPtr, godot_string_name*, void> ScriptManagerBridge_GetScriptNativeName;
+        public delegate* unmanaged<IntPtr, IntPtr, void> ScriptManagerBridge_SetGodotObjectPtr;
+        public delegate* unmanaged<IntPtr, godot_string_name*, godot_variant**, int, godot_bool*, void> ScriptManagerBridge_RaiseEventSignal;
+        public delegate* unmanaged<IntPtr, godot_dictionary*, void> ScriptManagerBridge_GetScriptSignalList;
+        public delegate* unmanaged<IntPtr, godot_string*, godot_bool> ScriptManagerBridge_HasScriptSignal;
+        public delegate* unmanaged<IntPtr, godot_string*, godot_bool, godot_bool> ScriptManagerBridge_HasMethodUnknownParams;
+        public delegate* unmanaged<IntPtr, IntPtr, godot_bool> ScriptManagerBridge_ScriptIsOrInherits;
+        public delegate* unmanaged<IntPtr, godot_string*, godot_bool> ScriptManagerBridge_AddScriptBridge;
+        public delegate* unmanaged<IntPtr, void> ScriptManagerBridge_RemoveScriptBridge;
+        public delegate* unmanaged<IntPtr, godot_bool*, godot_dictionary*, void> ScriptManagerBridge_UpdateScriptClassInfo;
+        public delegate* unmanaged<IntPtr, IntPtr*, godot_bool, godot_bool> ScriptManagerBridge_SwapGCHandleForType;
+        public delegate* unmanaged<IntPtr, godot_string_name*, godot_variant**, int, godot_variant_call_error*, godot_variant*, godot_bool> CSharpInstanceBridge_Call;
+        public delegate* unmanaged<IntPtr, godot_string_name*, godot_variant*, godot_bool> CSharpInstanceBridge_Set;
+        public delegate* unmanaged<IntPtr, godot_string_name*, godot_variant*, godot_bool> CSharpInstanceBridge_Get;
+        public delegate* unmanaged<IntPtr, godot_bool, void> CSharpInstanceBridge_CallDispose;
+        public delegate* unmanaged<IntPtr, godot_string*, godot_bool*, void> CSharpInstanceBridge_CallToString;
+        public delegate* unmanaged<IntPtr, void> GCHandleBridge_FreeGCHandle;
+        public delegate* unmanaged<void> DebuggingUtils_InstallTraceListener;
+        public delegate* unmanaged<void> Dispatcher_InitializeDefaultGodotTaskScheduler;
+        // @formatter:on
+
+        public static ManagedCallbacks Create()
+        {
+            return new()
+            {
+                // @formatter:off
+                SignalAwaiter_SignalCallback = &SignalAwaiter.SignalCallback,
+                DelegateUtils_InvokeWithVariantArgs = &DelegateUtils.InvokeWithVariantArgs,
+                DelegateUtils_DelegateEquals = &DelegateUtils.DelegateEquals,
+                ScriptManagerBridge_FrameCallback = &ScriptManagerBridge.FrameCallback,
+                ScriptManagerBridge_CreateManagedForGodotObjectBinding = &ScriptManagerBridge.CreateManagedForGodotObjectBinding,
+                ScriptManagerBridge_CreateManagedForGodotObjectScriptInstance = &ScriptManagerBridge.CreateManagedForGodotObjectScriptInstance,
+                ScriptManagerBridge_GetScriptNativeName = &ScriptManagerBridge.GetScriptNativeName,
+                ScriptManagerBridge_SetGodotObjectPtr = &ScriptManagerBridge.SetGodotObjectPtr,
+                ScriptManagerBridge_RaiseEventSignal = &ScriptManagerBridge.RaiseEventSignal,
+                ScriptManagerBridge_GetScriptSignalList = &ScriptManagerBridge.GetScriptSignalList,
+                ScriptManagerBridge_HasScriptSignal = &ScriptManagerBridge.HasScriptSignal,
+                ScriptManagerBridge_HasMethodUnknownParams = &ScriptManagerBridge.HasMethodUnknownParams,
+                ScriptManagerBridge_ScriptIsOrInherits = &ScriptManagerBridge.ScriptIsOrInherits,
+                ScriptManagerBridge_AddScriptBridge = &ScriptManagerBridge.AddScriptBridge,
+                ScriptManagerBridge_RemoveScriptBridge = &ScriptManagerBridge.RemoveScriptBridge,
+                ScriptManagerBridge_UpdateScriptClassInfo = &ScriptManagerBridge.UpdateScriptClassInfo,
+                ScriptManagerBridge_SwapGCHandleForType = &ScriptManagerBridge.SwapGCHandleForType,
+                CSharpInstanceBridge_Call = &CSharpInstanceBridge.Call,
+                CSharpInstanceBridge_Set = &CSharpInstanceBridge.Set,
+                CSharpInstanceBridge_Get = &CSharpInstanceBridge.Get,
+                CSharpInstanceBridge_CallDispose = &CSharpInstanceBridge.CallDispose,
+                CSharpInstanceBridge_CallToString = &CSharpInstanceBridge.CallToString,
+                GCHandleBridge_FreeGCHandle = &GCHandleBridge.FreeGCHandle,
+                DebuggingUtils_InstallTraceListener = &DebuggingUtils.InstallTraceListener,
+                Dispatcher_InitializeDefaultGodotTaskScheduler = &Dispatcher.InitializeDefaultGodotTaskScheduler,
+                // @formatter:on
+            };
+        }
+    }
+}
diff --git a/modules/mono/glue/GodotSharp/GodotSharp/Core/Bridge/ScriptManagerBridge.cs b/modules/mono/glue/GodotSharp/GodotSharp/Core/Bridge/ScriptManagerBridge.cs
index a39da68a02..9655887e52 100644
--- a/modules/mono/glue/GodotSharp/GodotSharp/Core/Bridge/ScriptManagerBridge.cs
+++ b/modules/mono/glue/GodotSharp/GodotSharp/Core/Bridge/ScriptManagerBridge.cs
@@ -27,99 +27,150 @@ namespace Godot.Bridge
             }
         };
 
+        [UnmanagedCallersOnly]
         internal static void FrameCallback()
         {
-            Dispatcher.DefaultGodotTaskScheduler?.Activate();
+            try
+            {
+                Dispatcher.DefaultGodotTaskScheduler?.Activate();
+            }
+            catch (Exception e)
+            {
+                ExceptionUtils.DebugUnhandledException(e);
+            }
         }
 
+        [UnmanagedCallersOnly]
         internal static unsafe IntPtr CreateManagedForGodotObjectBinding(godot_string_name* nativeTypeName,
             IntPtr godotObject)
         {
-            Type nativeType = TypeGetProxyClass(nativeTypeName);
-            var obj = (Object)FormatterServices.GetUninitializedObject(nativeType);
+            try
+            {
+                Type nativeType = TypeGetProxyClass(nativeTypeName);
+                var obj = (Object)FormatterServices.GetUninitializedObject(nativeType);
 
-            obj.NativePtr = godotObject;
+                obj.NativePtr = godotObject;
 
-            var ctor = nativeType.GetConstructor(
-                BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance,
-                null, Type.EmptyTypes, null);
-            _ = ctor!.Invoke(obj, null);
+                var ctor = nativeType.GetConstructor(
+                    BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance,
+                    null, Type.EmptyTypes, null);
+                _ = ctor!.Invoke(obj, null);
 
-            return GCHandle.ToIntPtr(GCHandle.Alloc(obj));
+                return GCHandle.ToIntPtr(GCHandle.Alloc(obj));
+            }
+            catch (Exception e)
+            {
+                ExceptionUtils.DebugPrintUnhandledException(e);
+                return IntPtr.Zero;
+            }
         }
 
-        internal static unsafe void CreateManagedForGodotObjectScriptInstance(IntPtr scriptPtr, IntPtr godotObject,
+        [UnmanagedCallersOnly]
+        internal static unsafe godot_bool CreateManagedForGodotObjectScriptInstance(IntPtr scriptPtr,
+            IntPtr godotObject,
             godot_variant** args, int argCount)
         {
-            // Performance is not critical here as this will be replaced with source generators.
-            Type scriptType = _scriptBridgeMap[scriptPtr];
-            var obj = (Object)FormatterServices.GetUninitializedObject(scriptType);
+            try
+            {
+                // Performance is not critical here as this will be replaced with source generators.
+                Type scriptType = _scriptBridgeMap[scriptPtr];
+                var obj = (Object)FormatterServices.GetUninitializedObject(scriptType);
 
-            obj.NativePtr = godotObject;
+                obj.NativePtr = godotObject;
 
-            var ctor = scriptType
-                .GetConstructors(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance)
-                .Where(c => c.GetParameters().Length == argCount)
-                .FirstOrDefault();
+                var ctor = scriptType
+                    .GetConstructors(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance)
+                    .Where(c => c.GetParameters().Length == argCount)
+                    .FirstOrDefault();
 
-            if (ctor == null)
-            {
-                if (argCount == 0)
-                {
-                    throw new MissingMemberException(
-                        $"Cannot create script instance. The class '{scriptType.FullName}' does not define a parameterless constructor.");
-                }
-                else
+                if (ctor == null)
                 {
-                    throw new MissingMemberException(
-                        $"The class '{scriptType.FullName}' does not define a constructor that takes x parameters.");
+                    if (argCount == 0)
+                    {
+                        throw new MissingMemberException(
+                            $"Cannot create script instance. The class '{scriptType.FullName}' does not define a parameterless constructor.");
+                    }
+                    else
+                    {
+                        throw new MissingMemberException(
+                            $"The class '{scriptType.FullName}' does not define a constructor that takes x parameters.");
+                    }
                 }
-            }
 
-            var parameters = ctor.GetParameters();
-            int paramCount = parameters.Length;
+                var parameters = ctor.GetParameters();
+                int paramCount = parameters.Length;
 
-            object[] invokeParams = new object[paramCount];
+                object[] invokeParams = new object[paramCount];
 
-            for (int i = 0; i < paramCount; i++)
+                for (int i = 0; i < paramCount; i++)
+                {
+                    invokeParams[i] = Marshaling.variant_to_mono_object_of_type(
+                        args[i], parameters[i].ParameterType);
+                }
+
+                ctor.Invoke(obj, invokeParams);
+                return true.ToGodotBool();
+            }
+            catch (Exception e)
             {
-                invokeParams[i] = Marshaling.variant_to_mono_object_of_type(
-                    args[i], parameters[i].ParameterType);
+                ExceptionUtils.DebugPrintUnhandledException(e);
+                return false.ToGodotBool();
             }
-
-            ctor.Invoke(obj, invokeParams);
         }
 
-        private static unsafe void GetScriptNativeName(IntPtr scriptPtr, godot_string_name* r_res)
+        [UnmanagedCallersOnly]
+        internal static unsafe void GetScriptNativeName(IntPtr scriptPtr, godot_string_name* outRes)
         {
-            // Performance is not critical here as this will be replaced with source generators.
-            if (!_scriptBridgeMap.TryGetValue(scriptPtr, out var scriptType))
+            try
             {
-                *r_res = default;
-                return;
-            }
+                // Performance is not critical here as this will be replaced with source generators.
+                if (!_scriptBridgeMap.TryGetValue(scriptPtr, out var scriptType))
+                {
+                    *outRes = default;
+                    return;
+                }
 
-            var native = Object.InternalGetClassNativeBase(scriptType);
+                var native = Object.InternalGetClassNativeBase(scriptType);
 
-            var field = native?.GetField("NativeName", BindingFlags.DeclaredOnly | BindingFlags.Static |
-                                                       BindingFlags.Public | BindingFlags.NonPublic);
+                var field = native?.GetField("NativeName", BindingFlags.DeclaredOnly | BindingFlags.Static |
+                                                           BindingFlags.Public | BindingFlags.NonPublic);
 
-            if (field == null)
-            {
-                *r_res = default;
-                return;
-            }
+                if (field == null)
+                {
+                    *outRes = default;
+                    return;
+                }
 
-            var nativeName = (StringName)field.GetValue(null);
+                var nativeName = (StringName)field.GetValue(null);
 
-            *r_res = NativeFuncs.godotsharp_string_name_new_copy(nativeName.NativeValue);
+                if (nativeName == null)
+                {
+                    *outRes = default;
+                    return;
+                }
+
+                *outRes = NativeFuncs.godotsharp_string_name_new_copy(nativeName.NativeValue);
+            }
+            catch (Exception e)
+            {
+                ExceptionUtils.DebugUnhandledException(e);
+                *outRes = default;
+            }
         }
 
-        private static void SetGodotObjectPtr(IntPtr gcHandlePtr, IntPtr newPtr)
+        [UnmanagedCallersOnly]
+        internal static void SetGodotObjectPtr(IntPtr gcHandlePtr, IntPtr newPtr)
         {
-            var target = (Object)GCHandle.FromIntPtr(gcHandlePtr).Target;
-            if (target != null)
-                target.NativePtr = newPtr;
+            try
+            {
+                var target = (Object)GCHandle.FromIntPtr(gcHandlePtr).Target;
+                if (target != null)
+                    target.NativePtr = newPtr;
+            }
+            catch (Exception e)
+            {
+                ExceptionUtils.DebugUnhandledException(e);
+            }
         }
 
         private static unsafe Type TypeGetProxyClass(godot_string_name* nativeTypeName)
@@ -152,7 +203,9 @@ namespace Godot.Bridge
             return wrapperType;
         }
 
-        internal static void LookupScriptsInAssembly(Assembly assembly)
+        // Called from GodotPlugins
+        // ReSharper disable once UnusedMember.Local
+        private static void LookupScriptsInAssembly(Assembly assembly)
         {
             static void LookupScriptForClass(Type type)
             {
@@ -208,294 +261,398 @@ namespace Godot.Bridge
             }
         }
 
+        [UnmanagedCallersOnly]
         internal static unsafe void RaiseEventSignal(IntPtr ownerGCHandlePtr,
-            godot_string_name* eventSignalName, godot_variant** args, int argCount, bool* r_ownerIsNull)
+            godot_string_name* eventSignalName, godot_variant** args, int argCount, godot_bool* outOwnerIsNull)
         {
-            var owner = (Object)GCHandle.FromIntPtr(ownerGCHandlePtr).Target;
-
-            if (owner == null)
+            try
             {
-                *r_ownerIsNull = true;
-                return;
-            }
+                var owner = (Object)GCHandle.FromIntPtr(ownerGCHandlePtr).Target;
+
+                if (owner == null)
+                {
+                    *outOwnerIsNull = true.ToGodotBool();
+                    return;
+                }
 
-            *r_ownerIsNull = false;
+                *outOwnerIsNull = false.ToGodotBool();
 
-            owner.InternalRaiseEventSignal(eventSignalName, args, argCount);
+                owner.InternalRaiseEventSignal(eventSignalName, args, argCount);
+            }
+            catch (Exception e)
+            {
+                ExceptionUtils.DebugPrintUnhandledException(e);
+                *outOwnerIsNull = false.ToGodotBool();
+            }
         }
 
-        internal static unsafe void GetScriptSignalList(IntPtr scriptPtr, godot_dictionary* r_retSignals)
+        [UnmanagedCallersOnly]
+        internal static unsafe void GetScriptSignalList(IntPtr scriptPtr, godot_dictionary* outRetSignals)
         {
-            // Performance is not critical here as this will be replaced with source generators.
-            using var signals = new Dictionary();
-
-            Type top = _scriptBridgeMap[scriptPtr];
-            Type native = Object.InternalGetClassNativeBase(top);
-
-            while (top != null && top != native)
+            try
             {
-                // Legacy signals
+                // Performance is not critical here as this will be replaced with source generators.
+                using var signals = new Dictionary();
+
+                Type top = _scriptBridgeMap[scriptPtr];
+                Type native = Object.InternalGetClassNativeBase(top);
 
-                foreach (var signalDelegate in top
-                    .GetNestedTypes(BindingFlags.DeclaredOnly | BindingFlags.NonPublic | BindingFlags.Public)
-                    .Where(nestedType => typeof(Delegate).IsAssignableFrom(nestedType))
-                    .Where(@delegate => @delegate.GetCustomAttributes().OfType<SignalAttribute>().Any()))
+                while (top != null && top != native)
                 {
-                    var invokeMethod = signalDelegate.GetMethod("Invoke");
+                    // Legacy signals
 
-                    if (invokeMethod == null)
-                        throw new MissingMethodException(signalDelegate.FullName, "Invoke");
+                    foreach (var signalDelegate in top
+                        .GetNestedTypes(BindingFlags.DeclaredOnly | BindingFlags.NonPublic | BindingFlags.Public)
+                        .Where(nestedType => typeof(Delegate).IsAssignableFrom(nestedType))
+                        .Where(@delegate => @delegate.GetCustomAttributes().OfType<SignalAttribute>().Any()))
+                    {
+                        var invokeMethod = signalDelegate.GetMethod("Invoke");
 
-                    var signalParams = new Collections.Array();
+                        if (invokeMethod == null)
+                            throw new MissingMethodException(signalDelegate.FullName, "Invoke");
 
-                    foreach (var parameters in invokeMethod.GetParameters())
-                    {
-                        var paramType = Marshaling.managed_to_variant_type(
-                            parameters.ParameterType, out bool nilIsVariant);
-                        signalParams.Add(new Dictionary()
+                        var signalParams = new Collections.Array();
+
+                        foreach (var parameters in invokeMethod.GetParameters())
                         {
-                            { "name", parameters.Name },
-                            { "type", paramType },
-                            { "nil_is_variant", nilIsVariant }
-                        });
+                            var paramType = Marshaling.managed_to_variant_type(
+                                parameters.ParameterType, out bool nilIsVariant);
+                            signalParams.Add(new Dictionary()
+                            {
+                                { "name", parameters.Name },
+                                { "type", paramType },
+                                { "nil_is_variant", nilIsVariant }
+                            });
+                        }
+
+                        signals.Add(signalDelegate.Name, signalParams);
                     }
 
-                    signals.Add(signalDelegate.Name, signalParams);
-                }
+                    // Event signals
 
-                // Event signals
+                    var foundEventSignals = top.GetEvents(
+                            BindingFlags.DeclaredOnly | BindingFlags.Instance |
+                            BindingFlags.NonPublic | BindingFlags.Public)
+                        .Where(ev => ev.GetCustomAttributes().OfType<SignalAttribute>().Any())
+                        .Select(ev => ev.Name);
 
-                var foundEventSignals = top.GetEvents(
+                    var fields = top.GetFields(
                         BindingFlags.DeclaredOnly | BindingFlags.Instance |
-                        BindingFlags.NonPublic | BindingFlags.Public)
-                    .Where(ev => ev.GetCustomAttributes().OfType<SignalAttribute>().Any())
-                    .Select(ev => ev.Name);
-
-                var fields = top.GetFields(
-                    BindingFlags.DeclaredOnly | BindingFlags.Instance |
-                    BindingFlags.NonPublic | BindingFlags.Public);
+                        BindingFlags.NonPublic | BindingFlags.Public);
 
-                foreach (var eventSignalField in fields
-                    .Where(f => typeof(Delegate).IsAssignableFrom(f.FieldType))
-                    .Where(f => foundEventSignals.Contains(f.Name)))
-                {
-                    var delegateType = eventSignalField.FieldType;
-                    var invokeMethod = delegateType.GetMethod("Invoke");
+                    foreach (var eventSignalField in fields
+                        .Where(f => typeof(Delegate).IsAssignableFrom(f.FieldType))
+                        .Where(f => foundEventSignals.Contains(f.Name)))
+                    {
+                        var delegateType = eventSignalField.FieldType;
+                        var invokeMethod = delegateType.GetMethod("Invoke");
 
-                    if (invokeMethod == null)
-                        throw new MissingMethodException(delegateType.FullName, "Invoke");
+                        if (invokeMethod == null)
+                            throw new MissingMethodException(delegateType.FullName, "Invoke");
 
-                    var signalParams = new Collections.Array();
+                        var signalParams = new Collections.Array();
 
-                    foreach (var parameters in invokeMethod.GetParameters())
-                    {
-                        var paramType = Marshaling.managed_to_variant_type(
-                            parameters.ParameterType, out bool nilIsVariant);
-                        signalParams.Add(new Dictionary()
+                        foreach (var parameters in invokeMethod.GetParameters())
                         {
-                            { "name", parameters.Name },
-                            { "type", paramType },
-                            { "nil_is_variant", nilIsVariant }
-                        });
+                            var paramType = Marshaling.managed_to_variant_type(
+                                parameters.ParameterType, out bool nilIsVariant);
+                            signalParams.Add(new Dictionary()
+                            {
+                                { "name", parameters.Name },
+                                { "type", paramType },
+                                { "nil_is_variant", nilIsVariant }
+                            });
+                        }
+
+                        signals.Add(eventSignalField.Name, signalParams);
                     }
 
-                    signals.Add(eventSignalField.Name, signalParams);
+                    top = top.BaseType;
                 }
 
-                top = top.BaseType;
+                *outRetSignals = NativeFuncs.godotsharp_dictionary_new_copy(signals.NativeValue);
+            }
+            catch (Exception e)
+            {
+                ExceptionUtils.DebugUnhandledException(e);
+                *outRetSignals = NativeFuncs.godotsharp_dictionary_new();
             }
-
-            *r_retSignals = NativeFuncs.godotsharp_dictionary_new_copy(signals.NativeValue);
         }
 
-        internal static unsafe bool HasScriptSignal(IntPtr scriptPtr, godot_string* signalName)
+        [UnmanagedCallersOnly]
+        internal static unsafe godot_bool HasScriptSignal(IntPtr scriptPtr, godot_string* signalName)
         {
-            // Performance is not critical here as this will be replaced with source generators.
-            using var signals = new Dictionary();
-
-            string signalNameStr = Marshaling.mono_string_from_godot(*signalName);
+            try
+            {
+                // Performance is not critical here as this will be replaced with source generators.
+                using var signals = new Dictionary();
 
-            Type top = _scriptBridgeMap[scriptPtr];
-            Type native = Object.InternalGetClassNativeBase(top);
+                string signalNameStr = Marshaling.mono_string_from_godot(*signalName);
 
-            while (top != null && top != native)
-            {
-                // Legacy signals
+                Type top = _scriptBridgeMap[scriptPtr];
+                Type native = Object.InternalGetClassNativeBase(top);
 
-                if (top
-                    .GetNestedTypes(BindingFlags.DeclaredOnly | BindingFlags.NonPublic | BindingFlags.Public)
-                    .Where(nestedType => typeof(Delegate).IsAssignableFrom(nestedType))
-                    .Where(@delegate => @delegate.GetCustomAttributes().OfType<SignalAttribute>().Any())
-                    .Any(signalDelegate => signalDelegate.Name == signalNameStr)
-                )
+                while (top != null && top != native)
                 {
-                    return true;
-                }
+                    // Legacy signals
+
+                    if (top
+                        .GetNestedTypes(BindingFlags.DeclaredOnly | BindingFlags.NonPublic | BindingFlags.Public)
+                        .Where(nestedType => typeof(Delegate).IsAssignableFrom(nestedType))
+                        .Where(@delegate => @delegate.GetCustomAttributes().OfType<SignalAttribute>().Any())
+                        .Any(signalDelegate => signalDelegate.Name == signalNameStr)
+                    )
+                    {
+                        return true.ToGodotBool();
+                    }
 
-                // Event signals
+                    // Event signals
 
-                if (top.GetEvents(
-                        BindingFlags.DeclaredOnly | BindingFlags.Instance |
-                        BindingFlags.NonPublic | BindingFlags.Public)
-                    .Where(ev => ev.GetCustomAttributes().OfType<SignalAttribute>().Any())
-                    .Any(eventSignal => eventSignal.Name == signalNameStr)
-                )
-                {
-                    return true;
+                    if (top.GetEvents(
+                            BindingFlags.DeclaredOnly | BindingFlags.Instance |
+                            BindingFlags.NonPublic | BindingFlags.Public)
+                        .Where(ev => ev.GetCustomAttributes().OfType<SignalAttribute>().Any())
+                        .Any(eventSignal => eventSignal.Name == signalNameStr)
+                    )
+                    {
+                        return true.ToGodotBool();
+                    }
+
+                    top = top.BaseType;
                 }
 
-                top = top.BaseType;
+                return false.ToGodotBool();
+            }
+            catch (Exception e)
+            {
+                ExceptionUtils.DebugUnhandledException(e);
+                return false.ToGodotBool();
             }
-
-            return false;
         }
 
-        internal static unsafe bool HasMethodUnknownParams(IntPtr scriptPtr, godot_string* method, bool deep)
+        [UnmanagedCallersOnly]
+        internal static unsafe godot_bool HasMethodUnknownParams(IntPtr scriptPtr, godot_string* method,
+            godot_bool deep)
         {
-            // Performance is not critical here as this will be replaced with source generators.
-            if (!_scriptBridgeMap.TryGetValue(scriptPtr, out var scriptType))
-                return false;
-
-            string methodStr = Marshaling.mono_string_from_godot(*method);
-
-            if (deep)
+            try
             {
-                Type top = scriptType;
-                Type native = Object.InternalGetClassNativeBase(scriptType);
+                // Performance is not critical here as this will be replaced with source generators.
+                if (!_scriptBridgeMap.TryGetValue(scriptPtr, out var scriptType))
+                    return false.ToGodotBool();
 
-                while (top != null && top != native)
+                string methodStr = Marshaling.mono_string_from_godot(*method);
+
+                if (deep.ToBool())
                 {
-                    var methodInfo = top.GetMethod(methodStr,
-                        BindingFlags.DeclaredOnly | BindingFlags.Instance |
-                        BindingFlags.NonPublic | BindingFlags.Public);
+                    Type top = scriptType;
+                    Type native = Object.InternalGetClassNativeBase(scriptType);
 
-                    if (methodInfo != null)
-                        return true;
+                    while (top != null && top != native)
+                    {
+                        var methodInfo = top.GetMethod(methodStr,
+                            BindingFlags.DeclaredOnly | BindingFlags.Instance |
+                            BindingFlags.NonPublic | BindingFlags.Public);
 
-                    top = top.BaseType;
-                }
+                        if (methodInfo != null)
+                            return true.ToGodotBool();
+
+                        top = top.BaseType;
+                    }
+
+                    top = native;
+                    Type typeOfSystemObject = typeof(System.Object);
+                    while (top != null && top != typeOfSystemObject)
+                    {
+                        bool found = top.GetMethods(BindingFlags.DeclaredOnly | BindingFlags.Instance |
+                                                    BindingFlags.NonPublic | BindingFlags.Public)
+                            .Where(m => m.GetCustomAttributes(false).OfType<GodotMethodAttribute>()
+                                .Where(a => a.MethodName == methodStr)
+                                .Any())
+                            .Any();
+
+                        if (found)
+                            return true.ToGodotBool();
 
-                return false;
+                        top = top.BaseType;
+                    }
+
+                    return false.ToGodotBool();
+                }
+                else
+                {
+                    var methodInfo = scriptType.GetMethod(methodStr, BindingFlags.DeclaredOnly | BindingFlags.Instance |
+                                                                     BindingFlags.NonPublic | BindingFlags.Public);
+                    return (methodInfo != null).ToGodotBool();
+                }
             }
-            else
+            catch (Exception e)
             {
-                var methodInfo = scriptType.GetMethod(methodStr, BindingFlags.DeclaredOnly | BindingFlags.Instance |
-                                                                 BindingFlags.NonPublic | BindingFlags.Public);
-                return methodInfo != null;
+                ExceptionUtils.DebugUnhandledException(e);
+                return false.ToGodotBool();
             }
         }
 
-        internal static bool ScriptIsOrInherits(IntPtr scriptPtr, IntPtr scriptPtrMaybeBase)
+        [UnmanagedCallersOnly]
+        internal static godot_bool ScriptIsOrInherits(IntPtr scriptPtr, IntPtr scriptPtrMaybeBase)
         {
-            if (!_scriptBridgeMap.TryGetValue(scriptPtr, out var scriptType))
-                return false;
+            try
+            {
+                if (!_scriptBridgeMap.TryGetValue(scriptPtr, out var scriptType))
+                    return false.ToGodotBool();
 
-            if (!_scriptBridgeMap.TryGetValue(scriptPtrMaybeBase, out var maybeBaseType))
-                return false;
+                if (!_scriptBridgeMap.TryGetValue(scriptPtrMaybeBase, out var maybeBaseType))
+                    return false.ToGodotBool();
 
-            return scriptType == maybeBaseType || maybeBaseType.IsAssignableFrom(scriptType);
+                return (scriptType == maybeBaseType || maybeBaseType.IsAssignableFrom(scriptType)).ToGodotBool();
+            }
+            catch (Exception e)
+            {
+                ExceptionUtils.DebugUnhandledException(e);
+                return false.ToGodotBool();
+            }
         }
 
-        internal static unsafe bool AddScriptBridge(IntPtr scriptPtr, godot_string* scriptPath)
+        [UnmanagedCallersOnly]
+        internal static unsafe godot_bool AddScriptBridge(IntPtr scriptPtr, godot_string* scriptPath)
         {
-            string scriptPathStr = Marshaling.mono_string_from_godot(*scriptPath);
+            try
+            {
+                string scriptPathStr = Marshaling.mono_string_from_godot(*scriptPath);
 
-            if (!_scriptLookupMap.TryGetValue(scriptPathStr, out var lookupInfo))
-                return false;
+                if (!_scriptLookupMap.TryGetValue(scriptPathStr, out var lookupInfo))
+                    return false.ToGodotBool();
 
-            _scriptBridgeMap.Add(scriptPtr, lookupInfo.ScriptType);
+                _scriptBridgeMap.Add(scriptPtr, lookupInfo.ScriptType);
 
-            return true;
+                return true.ToGodotBool();
+            }
+            catch (Exception e)
+            {
+                ExceptionUtils.DebugUnhandledException(e);
+                return false.ToGodotBool();
+            }
         }
 
         internal static void AddScriptBridgeWithType(IntPtr scriptPtr, Type scriptType)
             => _scriptBridgeMap.Add(scriptPtr, scriptType);
 
+        [UnmanagedCallersOnly]
         internal static void RemoveScriptBridge(IntPtr scriptPtr)
-            => _scriptBridgeMap.Remove(scriptPtr);
-
-        internal static unsafe void UpdateScriptClassInfo(IntPtr scriptPtr, bool* r_tool,
-            godot_dictionary* r_rpcFunctionsDest)
         {
-            // Performance is not critical here as this will be replaced with source generators.
-            var scriptType = _scriptBridgeMap[scriptPtr];
-
-            *r_tool = scriptType.GetCustomAttributes(inherit: false)
-                .OfType<ToolAttribute>()
-                .Any();
+            try
+            {
+                _scriptBridgeMap.Remove(scriptPtr);
+            }
+            catch (Exception e)
+            {
+                ExceptionUtils.DebugUnhandledException(e);
+            }
+        }
 
-            if (!*r_tool && scriptType.IsNested)
+        [UnmanagedCallersOnly]
+        internal static unsafe void UpdateScriptClassInfo(IntPtr scriptPtr, godot_bool* outTool,
+            godot_dictionary* outRpcFunctionsDest)
+        {
+            try
             {
-                *r_tool = scriptType.DeclaringType?.GetCustomAttributes(inherit: false)
+                // Performance is not critical here as this will be replaced with source generators.
+                var scriptType = _scriptBridgeMap[scriptPtr];
+
+                *outTool = scriptType.GetCustomAttributes(inherit: false)
                     .OfType<ToolAttribute>()
-                    .Any() ?? false;
-            }
+                    .Any().ToGodotBool();
 
-            if (!*r_tool && scriptType.Assembly.GetName().Name == "GodotTools")
-                *r_tool = true;
+                if (!(*outTool).ToBool() && scriptType.IsNested)
+                {
+                    *outTool = (scriptType.DeclaringType?.GetCustomAttributes(inherit: false)
+                        .OfType<ToolAttribute>()
+                        .Any() ?? false).ToGodotBool();
+                }
 
-            // RPC functions
+                if (!(*outTool).ToBool() && scriptType.Assembly.GetName().Name == "GodotTools")
+                    *outTool = true.ToGodotBool();
 
-            Dictionary<string, Dictionary> rpcFunctions = new();
+                // RPC functions
 
-            Type top = _scriptBridgeMap[scriptPtr];
-            Type native = Object.InternalGetClassNativeBase(top);
+                Dictionary<string, Dictionary> rpcFunctions = new();
 
-            while (top != null && top != native)
-            {
-                foreach (var method in top.GetMethods(BindingFlags.DeclaredOnly | BindingFlags.Instance |
-                                                      BindingFlags.NonPublic | BindingFlags.Public))
+                Type top = _scriptBridgeMap[scriptPtr];
+                Type native = Object.InternalGetClassNativeBase(top);
+
+                while (top != null && top != native)
                 {
-                    if (method.IsStatic)
-                        continue;
+                    foreach (var method in top.GetMethods(BindingFlags.DeclaredOnly | BindingFlags.Instance |
+                                                          BindingFlags.NonPublic | BindingFlags.Public))
+                    {
+                        if (method.IsStatic)
+                            continue;
 
-                    string methodName = method.Name;
+                        string methodName = method.Name;
 
-                    if (rpcFunctions.ContainsKey(methodName))
-                        continue;
+                        if (rpcFunctions.ContainsKey(methodName))
+                            continue;
 
-                    var rpcAttr = method.GetCustomAttributes(inherit: false)
-                        .OfType<RPCAttribute>().FirstOrDefault();
+                        var rpcAttr = method.GetCustomAttributes(inherit: false)
+                            .OfType<RPCAttribute>().FirstOrDefault();
 
-                    if (rpcAttr == null)
-                        continue;
+                        if (rpcAttr == null)
+                            continue;
 
-                    var rpcConfig = new Dictionary();
+                        var rpcConfig = new Dictionary();
 
-                    rpcConfig["rpc_mode"] = (long)rpcAttr.Mode;
-                    rpcConfig["call_local"] = rpcAttr.CallLocal;
-                    rpcConfig["transfer_mode"] = (long)rpcAttr.TransferMode;
-                    rpcConfig["channel"] = rpcAttr.TransferChannel;
+                        rpcConfig["rpc_mode"] = (long)rpcAttr.Mode;
+                        rpcConfig["call_local"] = rpcAttr.CallLocal;
+                        rpcConfig["transfer_mode"] = (long)rpcAttr.TransferMode;
+                        rpcConfig["channel"] = rpcAttr.TransferChannel;
+
+                        rpcFunctions.Add(methodName, rpcConfig);
+                    }
 
-                    rpcFunctions.Add(methodName, rpcConfig);
+                    top = top.BaseType;
                 }
 
-                top = top.BaseType;
+                *outRpcFunctionsDest =
+                    NativeFuncs.godotsharp_dictionary_new_copy(((Dictionary)rpcFunctions).NativeValue);
+            }
+            catch (Exception e)
+            {
+                ExceptionUtils.DebugUnhandledException(e);
+                *outTool = false.ToGodotBool();
+                *outRpcFunctionsDest = NativeFuncs.godotsharp_dictionary_new();
             }
-
-            *r_rpcFunctionsDest = NativeFuncs.godotsharp_dictionary_new_copy(((Dictionary)rpcFunctions).NativeValue);
         }
 
-        internal static unsafe bool SwapGCHandleForType(IntPtr oldGCHandlePtr, IntPtr* r_newGCHandlePtr,
-            bool createWeak)
+        [UnmanagedCallersOnly]
+        internal static unsafe godot_bool SwapGCHandleForType(IntPtr oldGCHandlePtr, IntPtr* outNewGCHandlePtr,
+            godot_bool createWeak)
         {
-            var oldGCHandle = GCHandle.FromIntPtr(oldGCHandlePtr);
+            try
+            {
+                var oldGCHandle = GCHandle.FromIntPtr(oldGCHandlePtr);
 
-            object target = oldGCHandle.Target;
+                object target = oldGCHandle.Target;
 
-            if (target == null)
-            {
-                oldGCHandle.Free();
-                *r_newGCHandlePtr = IntPtr.Zero;
-                return false; // Called after the managed side was collected, so nothing to do here
-            }
+                if (target == null)
+                {
+                    oldGCHandle.Free();
+                    *outNewGCHandlePtr = IntPtr.Zero;
+                    return false.ToGodotBool(); // Called after the managed side was collected, so nothing to do here
+                }
 
-            // Release the current weak handle and replace it with a strong handle.
-            var newGCHandle = GCHandle.Alloc(target, createWeak ? GCHandleType.Weak : GCHandleType.Normal);
+                // Release the current weak handle and replace it with a strong handle.
+                var newGCHandle = GCHandle.Alloc(target,
+                    createWeak.ToBool() ? GCHandleType.Weak : GCHandleType.Normal);
 
-            oldGCHandle.Free();
-            *r_newGCHandlePtr = GCHandle.ToIntPtr(newGCHandle);
-            return true;
+                oldGCHandle.Free();
+                *outNewGCHandlePtr = GCHandle.ToIntPtr(newGCHandle);
+                return true.ToGodotBool();
+            }
+            catch (Exception e)
+            {
+                ExceptionUtils.DebugUnhandledException(e);
+                *outNewGCHandlePtr = IntPtr.Zero;
+                return false.ToGodotBool();
+            }
         }
     }
 }
diff --git a/modules/mono/glue/GodotSharp/GodotSharp/Core/DebuggingUtils.cs b/modules/mono/glue/GodotSharp/GodotSharp/Core/DebuggingUtils.cs
index edfe3464ec..e446b3db1c 100644
--- a/modules/mono/glue/GodotSharp/GodotSharp/Core/DebuggingUtils.cs
+++ b/modules/mono/glue/GodotSharp/GodotSharp/Core/DebuggingUtils.cs
@@ -1,7 +1,9 @@
 using System;
 using System.Diagnostics;
 using System.Reflection;
+using System.Runtime.InteropServices;
 using System.Text;
+using Godot.NativeInterop;
 
 namespace Godot
 {
@@ -19,13 +21,23 @@ namespace Godot
             sb.Append(" ");
         }
 
-        public static void InstallTraceListener()
+        [UnmanagedCallersOnly]
+        internal static void InstallTraceListener()
         {
-            Trace.Listeners.Clear();
-            Trace.Listeners.Add(new GodotTraceListener());
+            try
+            {
+                Trace.Listeners.Clear();
+                Trace.Listeners.Add(new GodotTraceListener());
+            }
+            catch (Exception e)
+            {
+                ExceptionUtils.DebugPrintUnhandledException(e);
+                ExceptionUtils.PushError("Failed to install 'System.Diagnostics.Trace' listener.");
+            }
         }
 
-        public static void GetStackFrameInfo(StackFrame frame, out string fileName, out int fileLineNumber, out string methodDecl)
+        public static void GetStackFrameInfo(StackFrame frame, out string fileName, out int fileLineNumber,
+            out string methodDecl)
         {
             fileName = frame.GetFileName();
             fileLineNumber = frame.GetFileLineNumber();
diff --git a/modules/mono/glue/GodotSharp/GodotSharp/Core/DelegateUtils.cs b/modules/mono/glue/GodotSharp/GodotSharp/Core/DelegateUtils.cs
index 2a562d4d48..87c93e35f5 100644
--- a/modules/mono/glue/GodotSharp/GodotSharp/Core/DelegateUtils.cs
+++ b/modules/mono/glue/GodotSharp/GodotSharp/Core/DelegateUtils.cs
@@ -11,38 +11,56 @@ namespace Godot
 {
     internal static class DelegateUtils
     {
-        internal static bool DelegateEquals(IntPtr delegateGCHandleA, IntPtr delegateGCHandleB)
+        [UnmanagedCallersOnly]
+        internal static godot_bool DelegateEquals(IntPtr delegateGCHandleA, IntPtr delegateGCHandleB)
         {
-            var @delegateA = (Delegate)GCHandle.FromIntPtr(delegateGCHandleA).Target;
-            var @delegateB = (Delegate)GCHandle.FromIntPtr(delegateGCHandleB).Target;
-            return @delegateA == @delegateB;
+            try
+            {
+                var @delegateA = (Delegate)GCHandle.FromIntPtr(delegateGCHandleA).Target;
+                var @delegateB = (Delegate)GCHandle.FromIntPtr(delegateGCHandleB).Target;
+                return (@delegateA == @delegateB).ToGodotBool();
+            }
+            catch (Exception e)
+            {
+                ExceptionUtils.DebugUnhandledException(e);
+                return false.ToGodotBool();
+            }
         }
 
+        [UnmanagedCallersOnly]
         internal static unsafe void InvokeWithVariantArgs(IntPtr delegateGCHandle, godot_variant** args, uint argc,
-            godot_variant* ret)
+            godot_variant* outRet)
         {
-            // TODO: Optimize
-            var @delegate = (Delegate)GCHandle.FromIntPtr(delegateGCHandle).Target;
-            var managedArgs = new object[argc];
+            try
+            {
+                // TODO: Optimize
+                var @delegate = (Delegate)GCHandle.FromIntPtr(delegateGCHandle).Target;
+                var managedArgs = new object[argc];
 
-            var parameterInfos = @delegate.Method.GetParameters();
-            var paramsLength = parameterInfos.Length;
+                var parameterInfos = @delegate!.Method.GetParameters();
+                var paramsLength = parameterInfos.Length;
 
-            if (argc != paramsLength)
-            {
-                throw new InvalidOperationException(
-                    $"The delegate expects {paramsLength} arguments, but received {argc}.");
-            }
+                if (argc != paramsLength)
+                {
+                    throw new InvalidOperationException(
+                        $"The delegate expects {paramsLength} arguments, but received {argc}.");
+                }
 
-            for (uint i = 0; i < argc; i++)
-            {
-                managedArgs[i] = Marshaling.variant_to_mono_object_of_type(
-                    args[i], parameterInfos[i].ParameterType);
-            }
+                for (uint i = 0; i < argc; i++)
+                {
+                    managedArgs[i] = Marshaling.variant_to_mono_object_of_type(
+                        args[i], parameterInfos[i].ParameterType);
+                }
 
-            object invokeRet = @delegate.DynamicInvoke(managedArgs);
+                object invokeRet = @delegate.DynamicInvoke(managedArgs);
 
-            *ret = Marshaling.mono_object_to_variant(invokeRet);
+                *outRet = Marshaling.mono_object_to_variant(invokeRet);
+            }
+            catch (Exception e)
+            {
+                ExceptionUtils.DebugPrintUnhandledException(e);
+                *outRet = default;
+            }
         }
 
         // TODO: Check if we should be using BindingFlags.DeclaredOnly (would give better reflection performance).
diff --git a/modules/mono/glue/GodotSharp/GodotSharp/Core/Dictionary.cs b/modules/mono/glue/GodotSharp/GodotSharp/Core/Dictionary.cs
index 8bc33837e6..c21d53b4d4 100644
--- a/modules/mono/glue/GodotSharp/GodotSharp/Core/Dictionary.cs
+++ b/modules/mono/glue/GodotSharp/GodotSharp/Core/Dictionary.cs
@@ -76,7 +76,7 @@ namespace Godot.Collections
         public Dictionary Duplicate(bool deep = false)
         {
             godot_dictionary newDictionary;
-            NativeFuncs.godotsharp_dictionary_duplicate(ref NativeValue, deep, out newDictionary);
+            NativeFuncs.godotsharp_dictionary_duplicate(ref NativeValue, deep.ToGodotBool(), out newDictionary);
             return CreateTakingOwnershipOfDisposableValue(newDictionary);
         }
 
@@ -137,7 +137,7 @@ namespace Godot.Collections
             {
                 using godot_variant variantKey = Marshaling.mono_object_to_variant(key);
                 if (NativeFuncs.godotsharp_dictionary_try_get_value(ref NativeValue, &variantKey,
-                    out godot_variant value))
+                    out godot_variant value).ToBool())
                 {
                     using (value)
                         return Marshaling.variant_to_mono_object(&value);
@@ -165,7 +165,7 @@ namespace Godot.Collections
         {
             using godot_variant variantKey = Marshaling.mono_object_to_variant(key);
 
-            if (NativeFuncs.godotsharp_dictionary_contains_key(ref NativeValue, &variantKey))
+            if (NativeFuncs.godotsharp_dictionary_contains_key(ref NativeValue, &variantKey).ToBool())
                 throw new ArgumentException("An element with the same key already exists", nameof(key));
 
             using godot_variant variantValue = Marshaling.mono_object_to_variant(value);
@@ -185,7 +185,7 @@ namespace Godot.Collections
         public unsafe bool Contains(object key)
         {
             using godot_variant variantKey = Marshaling.mono_object_to_variant(key);
-            return NativeFuncs.godotsharp_dictionary_contains_key(ref NativeValue, &variantKey);
+            return NativeFuncs.godotsharp_dictionary_contains_key(ref NativeValue, &variantKey).ToBool();
         }
 
         /// <summary>
@@ -432,7 +432,7 @@ namespace Godot.Collections
                 {
                     using godot_variant variantKey = Marshaling.mono_object_to_variant(key);
                     if (NativeFuncs.godotsharp_dictionary_try_get_value(ref _underlyingDict.NativeValue,
-                        &variantKey, out godot_variant value))
+                        &variantKey, out godot_variant value).ToBool())
                     {
                         using (value)
                             return (TValue)Marshaling.variant_to_mono_object_of_type(&value, TypeOfValues);
@@ -513,7 +513,7 @@ namespace Godot.Collections
         public unsafe bool Remove(TKey key)
         {
             using godot_variant variantKey = Marshaling.mono_object_to_variant(key);
-            return NativeFuncs.godotsharp_dictionary_remove_key(ref _underlyingDict.NativeValue, &variantKey);
+            return NativeFuncs.godotsharp_dictionary_remove_key(ref _underlyingDict.NativeValue, &variantKey).ToBool();
         }
 
         /// <summary>
@@ -526,7 +526,7 @@ namespace Godot.Collections
         {
             using godot_variant variantKey = Marshaling.mono_object_to_variant(key);
             bool found = NativeFuncs.godotsharp_dictionary_try_get_value(ref _underlyingDict.NativeValue,
-                &variantKey, out godot_variant retValue);
+                &variantKey, out godot_variant retValue).ToBool();
 
             using (retValue)
             {
@@ -566,7 +566,7 @@ namespace Godot.Collections
         {
             using godot_variant variantKey = Marshaling.mono_object_to_variant(item.Key);
             bool found = NativeFuncs.godotsharp_dictionary_try_get_value(ref _underlyingDict.NativeValue,
-                &variantKey, out godot_variant retValue);
+                &variantKey, out godot_variant retValue).ToBool();
 
             using (retValue)
             {
@@ -574,7 +574,7 @@ namespace Godot.Collections
                     return false;
 
                 using godot_variant variantValue = Marshaling.mono_object_to_variant(item.Value);
-                return NativeFuncs.godotsharp_variant_equals(&variantValue, &retValue);
+                return NativeFuncs.godotsharp_variant_equals(&variantValue, &retValue).ToBool();
             }
         }
 
@@ -610,7 +610,7 @@ namespace Godot.Collections
         {
             using godot_variant variantKey = Marshaling.mono_object_to_variant(item.Key);
             bool found = NativeFuncs.godotsharp_dictionary_try_get_value(ref _underlyingDict.NativeValue,
-                &variantKey, out godot_variant retValue);
+                &variantKey, out godot_variant retValue).ToBool();
 
             using (retValue)
             {
@@ -618,8 +618,11 @@ namespace Godot.Collections
                     return false;
 
                 using godot_variant variantValue = Marshaling.mono_object_to_variant(item.Value);
-                if (NativeFuncs.godotsharp_variant_equals(&variantValue, &retValue))
-                    return NativeFuncs.godotsharp_dictionary_remove_key(ref _underlyingDict.NativeValue, &variantKey);
+                if (NativeFuncs.godotsharp_variant_equals(&variantValue, &retValue).ToBool())
+                {
+                    return NativeFuncs.godotsharp_dictionary_remove_key(
+                        ref _underlyingDict.NativeValue, &variantKey).ToBool();
+                }
 
                 return false;
             }
diff --git a/modules/mono/glue/GodotSharp/GodotSharp/Core/Dispatcher.cs b/modules/mono/glue/GodotSharp/GodotSharp/Core/Dispatcher.cs
index 5f84bb530f..e8cfb8e1b1 100644
--- a/modules/mono/glue/GodotSharp/GodotSharp/Core/Dispatcher.cs
+++ b/modules/mono/glue/GodotSharp/GodotSharp/Core/Dispatcher.cs
@@ -1,12 +1,24 @@
+using System;
+using System.Runtime.InteropServices;
+using Godot.NativeInterop;
+
 namespace Godot
 {
     public static class Dispatcher
     {
         internal static GodotTaskScheduler DefaultGodotTaskScheduler;
 
-        private static void InitializeDefaultGodotTaskScheduler()
+        [UnmanagedCallersOnly]
+        internal static void InitializeDefaultGodotTaskScheduler()
         {
-            DefaultGodotTaskScheduler = new GodotTaskScheduler();
+            try
+            {
+                DefaultGodotTaskScheduler = new GodotTaskScheduler();
+            }
+            catch (Exception e)
+            {
+                ExceptionUtils.DebugUnhandledException(e);
+            }
         }
 
         public static GodotSynchronizationContext SynchronizationContext => DefaultGodotTaskScheduler.Context;
diff --git a/modules/mono/glue/GodotSharp/GodotSharp/Core/Extensions/SceneTreeExtensions.cs b/modules/mono/glue/GodotSharp/GodotSharp/Core/Extensions/SceneTreeExtensions.cs
index b939da8778..17bca19fab 100644
--- a/modules/mono/glue/GodotSharp/GodotSharp/Core/Extensions/SceneTreeExtensions.cs
+++ b/modules/mono/glue/GodotSharp/GodotSharp/Core/Extensions/SceneTreeExtensions.cs
@@ -24,14 +24,16 @@ namespace Godot
             if (nativeBase)
             {
                 // Native type
-                var field = typeOfT.GetField("NativeName", BindingFlags.DeclaredOnly | BindingFlags.Static |
-                                                           BindingFlags.Public | BindingFlags.NonPublic);
+                var field = typeOfT.GetField("NativeName",
+                    BindingFlags.DeclaredOnly | BindingFlags.Static |
+                    BindingFlags.Public | BindingFlags.NonPublic);
 
                 var nativeName = (StringName)field!.GetValue(null);
                 godot_string_name nativeNameAux = nativeName.NativeValue;
                 godot_array inputAux = array.NativeValue;
                 godot_array filteredArray;
-                godotsharp_array_filter_godot_objects_by_native(&nativeNameAux, &inputAux, &filteredArray);
+                NativeFuncs.godotsharp_array_filter_godot_objects_by_native(
+                    &nativeNameAux, &inputAux, &filteredArray);
                 return Array<T>.CreateTakingOwnershipOfDisposableValue(filteredArray);
             }
             else
@@ -39,7 +41,7 @@ namespace Godot
                 // Custom derived type
                 godot_array inputAux = array.NativeValue;
                 godot_array filteredArray;
-                godotsharp_array_filter_godot_objects_by_non_native(&inputAux, &filteredArray);
+                NativeFuncs.godotsharp_array_filter_godot_objects_by_non_native(&inputAux, &filteredArray);
 
                 var filteredArrayWrapped = Array.CreateTakingOwnershipOfDisposableValue(filteredArray);
 
@@ -62,13 +64,5 @@ namespace Godot
                 return resWrapped;
             }
         }
-
-        [MethodImpl(MethodImplOptions.InternalCall)]
-        internal extern unsafe void godotsharp_array_filter_godot_objects_by_native(godot_string_name* p_native_name,
-            godot_array* p_input, godot_array* r_output);
-
-        [MethodImpl(MethodImplOptions.InternalCall)]
-        internal extern unsafe void godotsharp_array_filter_godot_objects_by_non_native(godot_array* p_input,
-            godot_array* r_output);
     }
 }
diff --git a/modules/mono/glue/GodotSharp/GodotSharp/Core/GD.cs b/modules/mono/glue/GodotSharp/GodotSharp/Core/GD.cs
index f428100ff7..39271d3daf 100644
--- a/modules/mono/glue/GodotSharp/GodotSharp/Core/GD.cs
+++ b/modules/mono/glue/GodotSharp/GodotSharp/Core/GD.cs
@@ -30,7 +30,7 @@ namespace Godot
         {
             using var varBytes = Marshaling.mono_array_to_PackedByteArray(bytes);
             using godot_variant ret = default;
-            NativeFuncs.godotsharp_bytes2var(&varBytes, allowObjects, &ret);
+            NativeFuncs.godotsharp_bytes2var(&varBytes, allowObjects.ToGodotBool(), &ret);
             return Marshaling.variant_to_mono_object(&ret);
         }
 
@@ -561,7 +561,7 @@ namespace Godot
         {
             using var variant = Marshaling.mono_object_to_variant(var);
             using godot_packed_byte_array varBytes = default;
-            NativeFuncs.godotsharp_var2bytes(&variant, fullObjects, &varBytes);
+            NativeFuncs.godotsharp_var2bytes(&variant, fullObjects.ToGodotBool(), &varBytes);
             using (varBytes)
                 return Marshaling.PackedByteArray_to_mono_array(&varBytes);
         }
diff --git a/modules/mono/glue/GodotSharp/GodotSharp/Core/NativeInterop/ExceptionUtils.cs b/modules/mono/glue/GodotSharp/GodotSharp/Core/NativeInterop/ExceptionUtils.cs
new file mode 100644
index 0000000000..2830d9c527
--- /dev/null
+++ b/modules/mono/glue/GodotSharp/GodotSharp/Core/NativeInterop/ExceptionUtils.cs
@@ -0,0 +1,74 @@
+using System;
+
+namespace Godot.NativeInterop
+{
+    internal static class ExceptionUtils
+    {
+        public static void PushError(string message)
+        {
+            GD.PushError(message);
+        }
+
+        private static void OnExceptionLoggerException(Exception loggerException, Exception exceptionToLog)
+        {
+            // This better not throw
+            PushError("Exception thrown when trying to log another exception...");
+            PushError("Exception:");
+            PushError(exceptionToLog.ToString());
+            PushError("Logger exception:");
+            PushError(loggerException.ToString());
+        }
+
+        public static void DebugPrintUnhandledException(Exception e)
+        {
+            try
+            {
+                // TODO Not implemented (debug_print_unhandled_exception)
+                GD.PushError(e.ToString());
+            }
+            catch (Exception unexpected)
+            {
+                OnExceptionLoggerException(unexpected, e);
+            }
+        }
+
+        public static void DebugSendUnhandledExceptionError(Exception e)
+        {
+            try
+            {
+                // TODO Not implemented (debug_send_unhandled_exception_error)
+                GD.PushError(e.ToString());
+            }
+            catch (Exception unexpected)
+            {
+                OnExceptionLoggerException(unexpected, e);
+            }
+        }
+
+        public static void DebugUnhandledException(Exception e)
+        {
+            try
+            {
+                // TODO Not implemented (debug_unhandled_exception)
+                GD.PushError(e.ToString());
+            }
+            catch (Exception unexpected)
+            {
+                OnExceptionLoggerException(unexpected, e);
+            }
+        }
+
+        public static void PrintUnhandledException(Exception e)
+        {
+            try
+            {
+                // TODO Not implemented (print_unhandled_exception)
+                GD.PushError(e.ToString());
+            }
+            catch (Exception unexpected)
+            {
+                OnExceptionLoggerException(unexpected, e);
+            }
+        }
+    }
+}
diff --git a/modules/mono/glue/GodotSharp/GodotSharp/Core/NativeInterop/InteropStructs.cs b/modules/mono/glue/GodotSharp/GodotSharp/Core/NativeInterop/InteropStructs.cs
index d8931f8348..0942d8f722 100644
--- a/modules/mono/glue/GodotSharp/GodotSharp/Core/NativeInterop/InteropStructs.cs
+++ b/modules/mono/glue/GodotSharp/GodotSharp/Core/NativeInterop/InteropStructs.cs
@@ -1,26 +1,36 @@
-using System;
-using System.Diagnostics.CodeAnalysis;
-using System.Runtime.CompilerServices;
-using System.Runtime.InteropServices;
 #if REAL_T_IS_DOUBLE
 using real_t = System.Double;
 #else
 using real_t = System.Single;
-
 #endif
+using System;
+using System.Diagnostics.CodeAnalysis;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
 
 namespace Godot.NativeInterop
 {
-    [StructLayout(LayoutKind.Sequential)]
-    // ReSharper disable once InconsistentNaming
-    public struct godot_bool
+    internal static class GodotBoolExtensions
     {
-        public byte _value;
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static unsafe godot_bool ToGodotBool(this bool @bool)
+        {
+            return *(godot_bool*)&@bool;
+        }
 
-        public unsafe godot_bool(bool value) => _value = *(byte*)&value;
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static unsafe bool ToBool(this godot_bool godotBool)
+        {
+            return *(bool*)&godotBool;
+        }
+    }
 
-        public static unsafe implicit operator bool(godot_bool godotBool) => *(bool*)&godotBool._value;
-        public static implicit operator godot_bool(bool @bool) => new godot_bool(@bool);
+    // Apparently a struct with a byte is not blittable? It crashes when calling a UnmanagedCallersOnly function ptr.
+    // ReSharper disable once InconsistentNaming
+    public enum godot_bool : byte
+    {
+        True = 1,
+        False = 0
     }
 
     [StructLayout(LayoutKind.Sequential)]
diff --git a/modules/mono/glue/GodotSharp/GodotSharp/Core/NativeInterop/InteropUtils.cs b/modules/mono/glue/GodotSharp/GodotSharp/Core/NativeInterop/InteropUtils.cs
index 5d53006140..5779421c69 100644
--- a/modules/mono/glue/GodotSharp/GodotSharp/Core/NativeInterop/InteropUtils.cs
+++ b/modules/mono/glue/GodotSharp/GodotSharp/Core/NativeInterop/InteropUtils.cs
@@ -16,13 +16,14 @@ namespace Godot.NativeInterop
                 return null;
 
             IntPtr gcHandlePtr;
-            bool has_cs_script_instance = false;
+            godot_bool has_cs_script_instance = false.ToGodotBool();
 
             // First try to get the tied managed instance from a CSharpInstance script instance
 
             unsafe
             {
-                gcHandlePtr = unmanaged_get_script_instance_managed(unmanaged, &has_cs_script_instance);
+                gcHandlePtr = NativeFuncs.godotsharp_internal_unmanaged_get_script_instance_managed(
+                    unmanaged, &has_cs_script_instance);
             }
 
             if (gcHandlePtr != IntPtr.Zero)
@@ -30,12 +31,12 @@ namespace Godot.NativeInterop
 
             // Otherwise, if the object has a CSharpInstance script instance, return null
 
-            if (has_cs_script_instance)
+            if (has_cs_script_instance.ToBool())
                 return null;
 
             // If it doesn't have a CSharpInstance script instance, try with native instance bindings
 
-            gcHandlePtr = unmanaged_get_instance_binding_managed(unmanaged);
+            gcHandlePtr = NativeFuncs.godotsharp_internal_unmanaged_get_instance_binding_managed(unmanaged);
 
             object target = gcHandlePtr != IntPtr.Zero ? GCHandle.FromIntPtr(gcHandlePtr).Target : null;
 
@@ -44,22 +45,12 @@ namespace Godot.NativeInterop
 
             // If the native instance binding GC handle target was collected, create a new one
 
-            gcHandlePtr = unmanaged_instance_binding_create_managed(unmanaged, gcHandlePtr);
+            gcHandlePtr = NativeFuncs.godotsharp_internal_unmanaged_instance_binding_create_managed(
+                unmanaged, gcHandlePtr);
 
             return gcHandlePtr != IntPtr.Zero ? (Object)GCHandle.FromIntPtr(gcHandlePtr).Target : null;
         }
 
-        [MethodImpl(MethodImplOptions.InternalCall)]
-        private static extern unsafe IntPtr unmanaged_get_script_instance_managed(IntPtr p_unmanaged,
-            bool* r_has_cs_script_instance);
-
-        [MethodImpl(MethodImplOptions.InternalCall)]
-        private static extern IntPtr unmanaged_get_instance_binding_managed(IntPtr p_unmanaged);
-
-        [MethodImpl(MethodImplOptions.InternalCall)]
-        private static extern IntPtr unmanaged_instance_binding_create_managed(IntPtr p_unmanaged,
-            IntPtr oldGCHandlePtr);
-
         public static void TieManagedToUnmanaged(Object managed, IntPtr unmanaged,
             StringName nativeName, bool refCounted, Type type, Type nativeType)
         {
@@ -70,30 +61,22 @@ namespace Godot.NativeInterop
                 unsafe
                 {
                     godot_string_name nativeNameAux = nativeName.NativeValue;
-                    internal_tie_native_managed_to_unmanaged(GCHandle.ToIntPtr(gcHandle), unmanaged,
-                        &nativeNameAux, refCounted);
+                    NativeFuncs.godotsharp_internal_tie_native_managed_to_unmanaged(
+                        GCHandle.ToIntPtr(gcHandle), unmanaged, &nativeNameAux, refCounted.ToGodotBool());
                 }
             }
             else
             {
-                IntPtr scriptPtr = internal_new_csharp_script();
+                IntPtr scriptPtr = NativeFuncs.godotsharp_internal_new_csharp_script();
 
                 ScriptManagerBridge.AddScriptBridgeWithType(scriptPtr, type);
 
                 // IMPORTANT: This must be called after AddScriptWithTypeBridge
-                internal_tie_user_managed_to_unmanaged(GCHandle.ToIntPtr(gcHandle), unmanaged,
-                    scriptPtr, refCounted);
+                NativeFuncs.godotsharp_internal_tie_user_managed_to_unmanaged(
+                    GCHandle.ToIntPtr(gcHandle), unmanaged, scriptPtr, refCounted.ToGodotBool());
             }
         }
 
-        [MethodImpl(MethodImplOptions.InternalCall)]
-        private static extern unsafe void internal_tie_native_managed_to_unmanaged(IntPtr gcHandleIntPtr,
-            IntPtr unmanaged, godot_string_name* nativeName, bool refCounted);
-
-        [MethodImpl(MethodImplOptions.InternalCall)]
-        private static extern void internal_tie_user_managed_to_unmanaged(IntPtr gcHandleIntPtr,
-            IntPtr unmanaged, IntPtr scriptPtr, bool refCounted);
-
         public static void TieManagedToUnmanagedWithPreSetup(Object managed, IntPtr unmanaged,
             Type type, Type nativeType)
         {
@@ -101,16 +84,10 @@ namespace Godot.NativeInterop
                 return;
 
             var strongGCHandle = GCHandle.Alloc(managed, GCHandleType.Normal);
-            internal_tie_managed_to_unmanaged_with_pre_setup(GCHandle.ToIntPtr(strongGCHandle), unmanaged);
+            NativeFuncs.godotsharp_internal_tie_managed_to_unmanaged_with_pre_setup(
+                GCHandle.ToIntPtr(strongGCHandle), unmanaged);
         }
 
-        [MethodImpl(MethodImplOptions.InternalCall)]
-        private static extern void internal_tie_managed_to_unmanaged_with_pre_setup(
-            IntPtr gcHandleIntPtr, IntPtr unmanaged);
-
-        [MethodImpl(MethodImplOptions.InternalCall)]
-        private static extern IntPtr internal_new_csharp_script();
-
         public static unsafe Object EngineGetSingleton(string name)
         {
             using godot_string src = Marshaling.mono_string_to_godot(name);
diff --git a/modules/mono/glue/GodotSharp/GodotSharp/Core/NativeInterop/Marshaling.cs b/modules/mono/glue/GodotSharp/GodotSharp/Core/NativeInterop/Marshaling.cs
index eae644af85..74232425bb 100644
--- a/modules/mono/glue/GodotSharp/GodotSharp/Core/NativeInterop/Marshaling.cs
+++ b/modules/mono/glue/GodotSharp/GodotSharp/Core/NativeInterop/Marshaling.cs
@@ -1,4 +1,5 @@
 using System;
+using System.Collections;
 using System.Collections.Generic;
 using System.Diagnostics.CodeAnalysis;
 using System.Reflection;
@@ -420,44 +421,18 @@ namespace Godot.NativeInterop
                         if (genericTypeDefinition == typeof(System.Collections.Generic.Dictionary<,>))
                         {
                             // TODO: Validate key and value types are compatible with Variant
-#if NET
-                            Collections.IGenericGodotDictionary genericGodotDictionary =
- IDictionaryToGenericGodotDictionary((dynamic)p_obj);
-#else
-                            var genericArguments = type.GetGenericArguments();
-
-                            // With .NET Standard we need a package reference for Microsoft.CSharp in order to
-                            // use dynamic, so we have this workaround for now until we switch to .NET 5/6.
-                            var method = typeof(Marshaling).GetMethod(nameof(IDictionaryToGenericGodotDictionary),
-                                    BindingFlags.NonPublic | BindingFlags.Static | BindingFlags.DeclaredOnly)!
-                                .MakeGenericMethod(genericArguments[0], genericArguments[1]);
+                            var godotDict = new Collections.Dictionary();
 
-                            var genericGodotDictionary = (Collections.IGenericGodotDictionary)method
-                                .Invoke(null, new[] { p_obj });
-#endif
+                            foreach (KeyValuePair<object, object> entry in (IDictionary)p_obj)
+                                godotDict.Add(entry.Key, entry.Value);
 
-                            var godotDict = genericGodotDictionary.UnderlyingDictionary;
-                            if (godotDict == null)
-                                return new godot_variant();
                             return VariantUtils.CreateFromDictionary(godotDict.NativeValue);
                         }
 
                         if (genericTypeDefinition == typeof(System.Collections.Generic.List<>))
                         {
                             // TODO: Validate element type is compatible with Variant
-#if NET
-                            var nativeGodotArray =
- (godot_array)mono_array_to_Array(System.Runtime.InteropServices.CollectionsMarshal.AsSpan((dynamic)p_obj));
-#else
-                            // With .NET Standard we need a package reference for Microsoft.CSharp in order to
-                            // use dynamic, so we have this workaround for now until we switch to .NET 5/6.
-                            // Also CollectionsMarshal.AsSpan is not available with .NET Standard.
-
-                            var collection = (System.Collections.ICollection)p_obj;
-                            var array = new object[collection.Count];
-                            collection.CopyTo(array, 0);
-                            var nativeGodotArray = mono_array_to_Array(array);
-#endif
+                            var nativeGodotArray = mono_array_to_Array((IList)p_obj);
                             return VariantUtils.CreateFromArray(&nativeGodotArray);
                         }
                     }
@@ -478,9 +453,6 @@ namespace Godot.NativeInterop
             }
         }
 
-        private static Collections.Dictionary<TKey, TValue> IDictionaryToGenericGodotDictionary<TKey, TValue>
-            (IDictionary<TKey, TValue> dictionary) => new(dictionary);
-
         public static unsafe string variant_to_mono_string(godot_variant* p_var)
         {
             switch ((*p_var)._type)
@@ -855,7 +827,7 @@ namespace Godot.NativeInterop
             switch ((*p_var)._type)
             {
                 case Variant.Type.Bool:
-                    return (bool)(*p_var)._data._bool;
+                    return (*p_var)._data._bool.ToBool();
                 case Variant.Type.Int:
                     return (*p_var)._data._int;
                 case Variant.Type.Float:
@@ -1058,7 +1030,7 @@ namespace Godot.NativeInterop
             godot_string_name name;
 
             if (NativeFuncs.godotsharp_callable_get_data_for_marshalling(
-                p_callable, &delegateGCHandle, &godotObject, &name))
+                p_callable, &delegateGCHandle, &godotObject, &name).ToBool())
             {
                 if (delegateGCHandle != IntPtr.Zero)
                 {
@@ -1141,15 +1113,37 @@ namespace Godot.NativeInterop
             return ret;
         }
 
-        public static godot_array mono_array_to_Array(Span<object> p_array)
+        public static godot_array mono_array_to_Array(object[] p_array)
         {
-            if (p_array.IsEmpty)
+            int length = p_array.Length;
+
+            if (length == 0)
                 return NativeFuncs.godotsharp_array_new();
 
             using var array = new Collections.Array();
-            array.Resize(p_array.Length);
+            array.Resize(length);
 
-            for (int i = 0; i < p_array.Length; i++)
+            for (int i = 0; i < length; i++)
+                array[i] = p_array[i];
+
+            godot_array src = array.NativeValue;
+            unsafe
+            {
+                return NativeFuncs.godotsharp_array_new_copy(&src);
+            }
+        }
+
+        public static godot_array mono_array_to_Array(IList p_array)
+        {
+            int length = p_array.Count;
+
+            if (length == 0)
+                return NativeFuncs.godotsharp_array_new();
+
+            using var array = new Collections.Array();
+            array.Resize(length);
+
+            for (int i = 0; i < length; i++)
                 array[i] = p_array[i];
 
             godot_array src = array.NativeValue;
diff --git a/modules/mono/glue/GodotSharp/GodotSharp/Core/NativeInterop/NativeFuncs.cs b/modules/mono/glue/GodotSharp/GodotSharp/Core/NativeInterop/NativeFuncs.cs
index 73ac837fe1..8bc785f375 100644
--- a/modules/mono/glue/GodotSharp/GodotSharp/Core/NativeInterop/NativeFuncs.cs
+++ b/modules/mono/glue/GodotSharp/GodotSharp/Core/NativeInterop/NativeFuncs.cs
@@ -20,20 +20,61 @@ namespace Godot.NativeInterop
         public static extern IntPtr godotsharp_method_bind_get_method(ref godot_string_name p_classname,
             char* p_methodname);
 
-#if NET
         [DllImport(GodotDllName)]
-        public static extern delegate* unmanaged<IntPtr> godotsharp_get_class_constructor(ref godot_string_name p_classname);
-#else
-        // Workaround until we switch to .NET 5/6
+        public static extern delegate* unmanaged<IntPtr> godotsharp_get_class_constructor(
+            ref godot_string_name p_classname);
+
         [DllImport(GodotDllName)]
-        public static extern IntPtr godotsharp_get_class_constructor(ref godot_string_name p_classname);
+        public static extern IntPtr godotsharp_engine_get_singleton(godot_string* p_name);
 
         [DllImport(GodotDllName)]
-        public static extern IntPtr godotsharp_invoke_class_constructor(IntPtr p_creation_func);
-#endif
+        internal static extern void godotsharp_internal_object_disposed(IntPtr ptr);
 
         [DllImport(GodotDllName)]
-        public static extern IntPtr godotsharp_engine_get_singleton(godot_string* p_name);
+        internal static extern void godotsharp_internal_refcounted_disposed(IntPtr ptr, godot_bool isFinalizer);
+
+        [DllImport(GodotDllName)]
+        internal static extern void godotsharp_internal_object_connect_event_signal(IntPtr obj,
+            godot_string_name* eventSignal);
+
+        [DllImport(GodotDllName)]
+        internal static extern Error godotsharp_internal_signal_awaiter_connect(IntPtr source,
+            ref godot_string_name signal,
+            IntPtr target, IntPtr awaiterHandlePtr);
+
+        [DllImport(GodotDllName)]
+        public static extern void godotsharp_internal_tie_native_managed_to_unmanaged(IntPtr gcHandleIntPtr,
+            IntPtr unmanaged, godot_string_name* nativeName, godot_bool refCounted);
+
+        [DllImport(GodotDllName)]
+        public static extern void godotsharp_internal_tie_user_managed_to_unmanaged(IntPtr gcHandleIntPtr,
+            IntPtr unmanaged, IntPtr scriptPtr, godot_bool refCounted);
+
+        [DllImport(GodotDllName)]
+        public static extern void godotsharp_internal_tie_managed_to_unmanaged_with_pre_setup(
+            IntPtr gcHandleIntPtr, IntPtr unmanaged);
+
+        [DllImport(GodotDllName)]
+        public static extern IntPtr godotsharp_internal_unmanaged_get_script_instance_managed(IntPtr p_unmanaged,
+            godot_bool* r_has_cs_script_instance);
+
+        [DllImport(GodotDllName)]
+        public static extern IntPtr godotsharp_internal_unmanaged_get_instance_binding_managed(IntPtr p_unmanaged);
+
+        [DllImport(GodotDllName)]
+        public static extern IntPtr godotsharp_internal_unmanaged_instance_binding_create_managed(IntPtr p_unmanaged,
+            IntPtr oldGCHandlePtr);
+
+        [DllImport(GodotDllName)]
+        public static extern IntPtr godotsharp_internal_new_csharp_script();
+
+        [DllImport(GodotDllName)]
+        public static extern void godotsharp_array_filter_godot_objects_by_native(godot_string_name* p_native_name,
+            godot_array* p_input, godot_array* r_output);
+
+        [DllImport(GodotDllName)]
+        public static extern void godotsharp_array_filter_godot_objects_by_non_native(godot_array* p_input,
+            godot_array* r_output);
 
         [DllImport(GodotDllName)]
         public static extern void godotsharp_ref_destroy(ref godot_ref p_instance);
@@ -509,12 +550,12 @@ namespace Godot.NativeInterop
         public static extern int godotsharp_node_path_get_subname_count(ref godot_node_path p_self);
 
         [DllImport(GodotDllName)]
-        public static extern bool godotsharp_node_path_is_absolute(ref godot_node_path p_self);
+        public static extern godot_bool godotsharp_node_path_is_absolute(ref godot_node_path p_self);
 
         // GD, etc
 
         [DllImport(GodotDllName)]
-        public static extern void godotsharp_bytes2var(godot_packed_byte_array* p_bytes, bool p_allow_objects,
+        public static extern void godotsharp_bytes2var(godot_packed_byte_array* p_bytes, godot_bool p_allow_objects,
             godot_variant* r_ret);
 
         [DllImport(GodotDllName)]
@@ -578,7 +619,7 @@ namespace Godot.NativeInterop
         public static extern void godotsharp_str2var(godot_string* p_str, godot_variant* r_ret);
 
         [DllImport(GodotDllName)]
-        public static extern void godotsharp_var2bytes(godot_variant* what, bool fullObjects,
+        public static extern void godotsharp_var2bytes(godot_variant* what, godot_bool fullObjects,
             godot_packed_byte_array* bytes);
 
         [DllImport(GodotDllName)]
diff --git a/modules/mono/glue/GodotSharp/GodotSharp/Core/NativeInterop/VariantUtils.cs b/modules/mono/glue/GodotSharp/GodotSharp/Core/NativeInterop/VariantUtils.cs
index 91ba864687..e52454a2e3 100644
--- a/modules/mono/glue/GodotSharp/GodotSharp/Core/NativeInterop/VariantUtils.cs
+++ b/modules/mono/glue/GodotSharp/GodotSharp/Core/NativeInterop/VariantUtils.cs
@@ -8,46 +8,46 @@ namespace Godot.NativeInterop
     public static class VariantUtils
     {
         public static godot_variant CreateFromRID(RID from)
-            => new() {_type = Variant.Type.Rid, _data = {_m_rid = from}};
+            => new() { _type = Variant.Type.Rid, _data = { _m_rid = from } };
 
         public static godot_variant CreateFromBool(bool from)
-            => new() {_type = Variant.Type.Bool, _data = {_bool = from}};
+            => new() { _type = Variant.Type.Bool, _data = { _bool = from.ToGodotBool() } };
 
         public static godot_variant CreateFromInt(long from)
-            => new() {_type = Variant.Type.Int, _data = {_int = from}};
+            => new() { _type = Variant.Type.Int, _data = { _int = from } };
 
         public static godot_variant CreateFromInt(ulong from)
-            => new() {_type = Variant.Type.Int, _data = {_int = (long)from}};
+            => new() { _type = Variant.Type.Int, _data = { _int = (long)from } };
 
         public static godot_variant CreateFromFloat(double from)
-            => new() {_type = Variant.Type.Float, _data = {_float = from}};
+            => new() { _type = Variant.Type.Float, _data = { _float = from } };
 
         public static godot_variant CreateFromVector2(Vector2 from)
-            => new() {_type = Variant.Type.Vector2, _data = {_m_vector2 = from}};
+            => new() { _type = Variant.Type.Vector2, _data = { _m_vector2 = from } };
 
         public static godot_variant CreateFromVector2i(Vector2i from)
-            => new() {_type = Variant.Type.Vector2i, _data = {_m_vector2i = from}};
+            => new() { _type = Variant.Type.Vector2i, _data = { _m_vector2i = from } };
 
         public static godot_variant CreateFromVector3(Vector3 from)
-            => new() {_type = Variant.Type.Vector3, _data = {_m_vector3 = from}};
+            => new() { _type = Variant.Type.Vector3, _data = { _m_vector3 = from } };
 
         public static godot_variant CreateFromVector3i(Vector3i from)
-            => new() {_type = Variant.Type.Vector3i, _data = {_m_vector3i = from}};
+            => new() { _type = Variant.Type.Vector3i, _data = { _m_vector3i = from } };
 
         public static godot_variant CreateFromRect2(Rect2 from)
-            => new() {_type = Variant.Type.Rect2, _data = {_m_rect2 = from}};
+            => new() { _type = Variant.Type.Rect2, _data = { _m_rect2 = from } };
 
         public static godot_variant CreateFromRect2i(Rect2i from)
-            => new() {_type = Variant.Type.Rect2i, _data = {_m_rect2i = from}};
+            => new() { _type = Variant.Type.Rect2i, _data = { _m_rect2i = from } };
 
         public static godot_variant CreateFromQuaternion(Quaternion from)
-            => new() {_type = Variant.Type.Quaternion, _data = {_m_quaternion = from}};
+            => new() { _type = Variant.Type.Quaternion, _data = { _m_quaternion = from } };
 
         public static godot_variant CreateFromColor(Color from)
-            => new() {_type = Variant.Type.Color, _data = {_m_color = from}};
+            => new() { _type = Variant.Type.Color, _data = { _m_color = from } };
 
         public static godot_variant CreateFromPlane(Plane from)
-            => new() {_type = Variant.Type.Plane, _data = {_m_plane = from}};
+            => new() { _type = Variant.Type.Plane, _data = { _m_plane = from } };
 
         public static unsafe godot_variant CreateFromTransform2D(Transform2D from)
         {
@@ -100,15 +100,15 @@ namespace Godot.NativeInterop
 
         // Explicit name to make it very clear
         public static godot_variant CreateFromCallableTakingOwnershipOfDisposableValue(godot_callable from)
-            => new() {_type = Variant.Type.Callable, _data = {_m_callable = from}};
+            => new() { _type = Variant.Type.Callable, _data = { _m_callable = from } };
 
         // Explicit name to make it very clear
         public static godot_variant CreateFromSignalTakingOwnershipOfDisposableValue(godot_signal from)
-            => new() {_type = Variant.Type.Signal, _data = {_m_signal = from}};
+            => new() { _type = Variant.Type.Signal, _data = { _m_signal = from } };
 
         // Explicit name to make it very clear
         public static godot_variant CreateFromStringTakingOwnershipOfDisposableValue(godot_string from)
-            => new() {_type = Variant.Type.String, _data = {_m_string = from}};
+            => new() { _type = Variant.Type.String, _data = { _m_string = from } };
 
         public static unsafe godot_variant CreateFromPackedByteArray(godot_packed_byte_array* from)
         {
@@ -223,61 +223,97 @@ namespace Godot.NativeInterop
         // We avoid the internal call if the stored type is the same we want.
 
         public static unsafe bool ConvertToBool(godot_variant* p_var)
-            => (*p_var)._type == Variant.Type.Bool ? (*p_var)._data._bool : NativeFuncs.godotsharp_variant_as_bool(p_var);
+            => (*p_var)._type == Variant.Type.Bool ?
+                (*p_var)._data._bool.ToBool() :
+                NativeFuncs.godotsharp_variant_as_bool(p_var).ToBool();
 
         public static unsafe char ConvertToChar(godot_variant* p_var)
-            => (char)((*p_var)._type == Variant.Type.Int ? (*p_var)._data._int : NativeFuncs.godotsharp_variant_as_int(p_var));
+            => (char)((*p_var)._type == Variant.Type.Int ?
+                (*p_var)._data._int :
+                NativeFuncs.godotsharp_variant_as_int(p_var));
 
         public static unsafe sbyte ConvertToInt8(godot_variant* p_var)
-            => (sbyte)((*p_var)._type == Variant.Type.Int ? (*p_var)._data._int : NativeFuncs.godotsharp_variant_as_int(p_var));
+            => (sbyte)((*p_var)._type == Variant.Type.Int ?
+                (*p_var)._data._int :
+                NativeFuncs.godotsharp_variant_as_int(p_var));
 
         public static unsafe Int16 ConvertToInt16(godot_variant* p_var)
-            => (Int16)((*p_var)._type == Variant.Type.Int ? (*p_var)._data._int : NativeFuncs.godotsharp_variant_as_int(p_var));
+            => (Int16)((*p_var)._type == Variant.Type.Int ?
+                (*p_var)._data._int :
+                NativeFuncs.godotsharp_variant_as_int(p_var));
 
         public static unsafe Int32 ConvertToInt32(godot_variant* p_var)
-            => (Int32)((*p_var)._type == Variant.Type.Int ? (*p_var)._data._int : NativeFuncs.godotsharp_variant_as_int(p_var));
+            => (Int32)((*p_var)._type == Variant.Type.Int ?
+                (*p_var)._data._int :
+                NativeFuncs.godotsharp_variant_as_int(p_var));
 
         public static unsafe Int64 ConvertToInt64(godot_variant* p_var)
             => (*p_var)._type == Variant.Type.Int ? (*p_var)._data._int : NativeFuncs.godotsharp_variant_as_int(p_var);
 
         public static unsafe byte ConvertToUInt8(godot_variant* p_var)
-            => (byte)((*p_var)._type == Variant.Type.Int ? (*p_var)._data._int : NativeFuncs.godotsharp_variant_as_int(p_var));
+            => (byte)((*p_var)._type == Variant.Type.Int ?
+                (*p_var)._data._int :
+                NativeFuncs.godotsharp_variant_as_int(p_var));
 
         public static unsafe UInt16 ConvertToUInt16(godot_variant* p_var)
-            => (UInt16)((*p_var)._type == Variant.Type.Int ? (*p_var)._data._int : NativeFuncs.godotsharp_variant_as_int(p_var));
+            => (UInt16)((*p_var)._type == Variant.Type.Int ?
+                (*p_var)._data._int :
+                NativeFuncs.godotsharp_variant_as_int(p_var));
 
         public static unsafe UInt32 ConvertToUInt32(godot_variant* p_var)
-            => (UInt32)((*p_var)._type == Variant.Type.Int ? (*p_var)._data._int : NativeFuncs.godotsharp_variant_as_int(p_var));
+            => (UInt32)((*p_var)._type == Variant.Type.Int ?
+                (*p_var)._data._int :
+                NativeFuncs.godotsharp_variant_as_int(p_var));
 
         public static unsafe UInt64 ConvertToUInt64(godot_variant* p_var)
-            => (UInt64)((*p_var)._type == Variant.Type.Int ? (*p_var)._data._int : NativeFuncs.godotsharp_variant_as_int(p_var));
+            => (UInt64)((*p_var)._type == Variant.Type.Int ?
+                (*p_var)._data._int :
+                NativeFuncs.godotsharp_variant_as_int(p_var));
 
         public static unsafe float ConvertToFloat32(godot_variant* p_var)
-            => (float)((*p_var)._type == Variant.Type.Float ? (*p_var)._data._float : NativeFuncs.godotsharp_variant_as_float(p_var));
+            => (float)((*p_var)._type == Variant.Type.Float ?
+                (*p_var)._data._float :
+                NativeFuncs.godotsharp_variant_as_float(p_var));
 
         public static unsafe double ConvertToFloat64(godot_variant* p_var)
-            => (*p_var)._type == Variant.Type.Float ? (*p_var)._data._float : NativeFuncs.godotsharp_variant_as_float(p_var);
+            => (*p_var)._type == Variant.Type.Float ?
+                (*p_var)._data._float :
+                NativeFuncs.godotsharp_variant_as_float(p_var);
 
         public static unsafe Vector2 ConvertToVector2(godot_variant* p_var)
-            => (*p_var)._type == Variant.Type.Vector2 ? (*p_var)._data._m_vector2 : NativeFuncs.godotsharp_variant_as_vector2(p_var);
+            => (*p_var)._type == Variant.Type.Vector2 ?
+                (*p_var)._data._m_vector2 :
+                NativeFuncs.godotsharp_variant_as_vector2(p_var);
 
         public static unsafe Vector2i ConvertToVector2i(godot_variant* p_var)
-            => (*p_var)._type == Variant.Type.Vector2i ? (*p_var)._data._m_vector2i : NativeFuncs.godotsharp_variant_as_vector2i(p_var);
+            => (*p_var)._type == Variant.Type.Vector2i ?
+                (*p_var)._data._m_vector2i :
+                NativeFuncs.godotsharp_variant_as_vector2i(p_var);
 
         public static unsafe Rect2 ConvertToRect2(godot_variant* p_var)
-            => (*p_var)._type == Variant.Type.Rect2 ? (*p_var)._data._m_rect2 : NativeFuncs.godotsharp_variant_as_rect2(p_var);
+            => (*p_var)._type == Variant.Type.Rect2 ?
+                (*p_var)._data._m_rect2 :
+                NativeFuncs.godotsharp_variant_as_rect2(p_var);
 
         public static unsafe Rect2i ConvertToRect2i(godot_variant* p_var)
-            => (*p_var)._type == Variant.Type.Rect2i ? (*p_var)._data._m_rect2i : NativeFuncs.godotsharp_variant_as_rect2i(p_var);
+            => (*p_var)._type == Variant.Type.Rect2i ?
+                (*p_var)._data._m_rect2i :
+                NativeFuncs.godotsharp_variant_as_rect2i(p_var);
 
         public static unsafe Transform2D ConvertToTransform2D(godot_variant* p_var)
-            => (*p_var)._type == Variant.Type.Transform2d ? *(*p_var)._data._transform2d : NativeFuncs.godotsharp_variant_as_transform2d(p_var);
+            => (*p_var)._type == Variant.Type.Transform2d ?
+                *(*p_var)._data._transform2d :
+                NativeFuncs.godotsharp_variant_as_transform2d(p_var);
 
         public static unsafe Vector3 ConvertToVector3(godot_variant* p_var)
-            => (*p_var)._type == Variant.Type.Vector3 ? (*p_var)._data._m_vector3 : NativeFuncs.godotsharp_variant_as_vector3(p_var);
+            => (*p_var)._type == Variant.Type.Vector3 ?
+                (*p_var)._data._m_vector3 :
+                NativeFuncs.godotsharp_variant_as_vector3(p_var);
 
         public static unsafe Vector3i ConvertToVector3i(godot_variant* p_var)
-            => (*p_var)._type == Variant.Type.Vector3i ? (*p_var)._data._m_vector3i : NativeFuncs.godotsharp_variant_as_vector3i(p_var);
+            => (*p_var)._type == Variant.Type.Vector3i ?
+                (*p_var)._data._m_vector3i :
+                NativeFuncs.godotsharp_variant_as_vector3i(p_var);
 
         public static unsafe Vector4 ConvertToVector4(godot_variant* p_var)
             => (*p_var)._type == Variant.Type.Vector4 ? *(*p_var)._data._vector4 : NativeFuncs.godotsharp_variant_as_vector4(p_var);
@@ -286,31 +322,45 @@ namespace Godot.NativeInterop
             => (*p_var)._type == Variant.Type.Vector4i ? *(*p_var)._data._vector4i : NativeFuncs.godotsharp_variant_as_vector4i(p_var);
 
         public static unsafe Basis ConvertToBasis(godot_variant* p_var)
-            => (*p_var)._type == Variant.Type.Basis ? *(*p_var)._data._basis : NativeFuncs.godotsharp_variant_as_basis(p_var);
+            => (*p_var)._type == Variant.Type.Basis ?
+                *(*p_var)._data._basis :
+                NativeFuncs.godotsharp_variant_as_basis(p_var);
 
         public static unsafe Quaternion ConvertToQuaternion(godot_variant* p_var)
-            => (*p_var)._type == Variant.Type.Quaternion ? (*p_var)._data._m_quaternion : NativeFuncs.godotsharp_variant_as_quaternion(p_var);
+            => (*p_var)._type == Variant.Type.Quaternion ?
+                (*p_var)._data._m_quaternion :
+                NativeFuncs.godotsharp_variant_as_quaternion(p_var);
 
         public static unsafe Transform3D ConvertToTransform3D(godot_variant* p_var)
-            => (*p_var)._type == Variant.Type.Transform3d ? *(*p_var)._data._transform3d : NativeFuncs.godotsharp_variant_as_transform3d(p_var);
+            => (*p_var)._type == Variant.Type.Transform3d ?
+                *(*p_var)._data._transform3d :
+                NativeFuncs.godotsharp_variant_as_transform3d(p_var);
 
         public static unsafe Projection ConvertToProjection(godot_variant* p_var)
             => (*p_var)._type == Variant.Type.Projection ? *(*p_var)._data._projection : NativeFuncs.godotsharp_variant_as_projection(p_var);
 
         public static unsafe AABB ConvertToAABB(godot_variant* p_var)
-            => (*p_var)._type == Variant.Type.Aabb ? *(*p_var)._data._aabb : NativeFuncs.godotsharp_variant_as_aabb(p_var);
+            => (*p_var)._type == Variant.Type.Aabb ?
+                *(*p_var)._data._aabb :
+                NativeFuncs.godotsharp_variant_as_aabb(p_var);
 
         public static unsafe Color ConvertToColor(godot_variant* p_var)
-            => (*p_var)._type == Variant.Type.Color ? (*p_var)._data._m_color : NativeFuncs.godotsharp_variant_as_color(p_var);
+            => (*p_var)._type == Variant.Type.Color ?
+                (*p_var)._data._m_color :
+                NativeFuncs.godotsharp_variant_as_color(p_var);
 
         public static unsafe Plane ConvertToPlane(godot_variant* p_var)
-            => (*p_var)._type == Variant.Type.Plane ? (*p_var)._data._m_plane : NativeFuncs.godotsharp_variant_as_plane(p_var);
+            => (*p_var)._type == Variant.Type.Plane ?
+                (*p_var)._data._m_plane :
+                NativeFuncs.godotsharp_variant_as_plane(p_var);
 
         public static unsafe IntPtr ConvertToGodotObject(godot_variant* p_var)
             => (*p_var)._type == Variant.Type.Object ? (*p_var)._data._m_obj_data.obj : IntPtr.Zero;
 
         public static unsafe RID ConvertToRID(godot_variant* p_var)
-            => (*p_var)._type == Variant.Type.Rid ? (*p_var)._data._m_rid : NativeFuncs.godotsharp_variant_as_rid(p_var);
+            => (*p_var)._type == Variant.Type.Rid ?
+                (*p_var)._data._m_rid :
+                NativeFuncs.godotsharp_variant_as_rid(p_var);
 
         public static unsafe godot_string_name ConvertToStringName(godot_variant* p_var)
             => (*p_var)._type == Variant.Type.StringName ?
diff --git a/modules/mono/glue/GodotSharp/GodotSharp/Core/NodePath.cs b/modules/mono/glue/GodotSharp/GodotSharp/Core/NodePath.cs
index 824f29558f..b18606b47e 100644
--- a/modules/mono/glue/GodotSharp/GodotSharp/Core/NodePath.cs
+++ b/modules/mono/glue/GodotSharp/GodotSharp/Core/NodePath.cs
@@ -263,7 +263,7 @@ namespace Godot
         /// <returns>If the <see cref="NodePath"/> is an absolute path.</returns>
         public bool IsAbsolute()
         {
-            return NativeFuncs.godotsharp_node_path_is_absolute(ref NativeValue);
+            return NativeFuncs.godotsharp_node_path_is_absolute(ref NativeValue).ToBool();
         }
 
         /// <summary>
diff --git a/modules/mono/glue/GodotSharp/GodotSharp/Core/Object.base.cs b/modules/mono/glue/GodotSharp/GodotSharp/Core/Object.base.cs
index 763483a11f..98266ffdfc 100644
--- a/modules/mono/glue/GodotSharp/GodotSharp/Core/Object.base.cs
+++ b/modules/mono/glue/GodotSharp/GodotSharp/Core/Object.base.cs
@@ -21,14 +21,11 @@ namespace Godot
         {
             if (NativePtr == IntPtr.Zero)
             {
-#if NET
                 unsafe
                 {
                     NativePtr = NativeCtor();
                 }
-#else
-                NativePtr = _gd__invoke_class_constructor(NativeCtor);
-#endif
+
                 InteropUtils.TieManagedToUnmanaged(this, NativePtr,
                     NativeName, refCounted: false, GetType(), _cachedType);
             }
@@ -58,7 +55,7 @@ namespace Godot
                     {
                         using var eventSignalName = new StringName(eventSignal.Name);
                         godot_string_name eventSignalNameAux = eventSignalName.NativeValue;
-                        godot_icall_Object_ConnectEventSignal(NativePtr, &eventSignalNameAux);
+                        NativeFuncs.godotsharp_internal_object_connect_event_signal(NativePtr, &eventSignalNameAux);
                     }
                 }
 
@@ -114,14 +111,14 @@ namespace Godot
                 if (MemoryOwn)
                 {
                     MemoryOwn = false;
-                    godot_icall_RefCounted_Disposed(NativePtr, !disposing);
+                    NativeFuncs.godotsharp_internal_refcounted_disposed(NativePtr, (!disposing).ToGodotBool());
                 }
                 else
                 {
-                    godot_icall_Object_Disposed(NativePtr);
+                    NativeFuncs.godotsharp_internal_object_disposed(NativePtr);
                 }
 
-                this.NativePtr = IntPtr.Zero;
+                NativePtr = IntPtr.Zero;
             }
 
             _disposed = true;
@@ -391,7 +388,6 @@ namespace Godot
             return methodBind;
         }
 
-#if NET
         internal static unsafe delegate* unmanaged<IntPtr> ClassDB_get_constructor(StringName type)
         {
             // for some reason the '??' operator doesn't support 'delegate*'
@@ -402,30 +398,5 @@ namespace Godot
 
             return nativeConstructor;
         }
-#else
-        internal static IntPtr ClassDB_get_constructor(StringName type)
-        {
-            // for some reason the '??' operator doesn't support 'delegate*'
-            var nativeConstructor = NativeFuncs.godotsharp_get_class_constructor(ref type.NativeValue);
-
-            if (nativeConstructor == IntPtr.Zero)
-                throw new NativeConstructorNotFoundException(type);
-
-            return nativeConstructor;
-        }
-
-        internal static IntPtr _gd__invoke_class_constructor(IntPtr ctorFuncPtr)
-            => NativeFuncs.godotsharp_invoke_class_constructor(ctorFuncPtr);
-#endif
-
-        [MethodImpl(MethodImplOptions.InternalCall)]
-        internal static extern void godot_icall_Object_Disposed(IntPtr ptr);
-
-        [MethodImpl(MethodImplOptions.InternalCall)]
-        internal static extern void godot_icall_RefCounted_Disposed(IntPtr ptr, bool isFinalizer);
-
-        [MethodImpl(MethodImplOptions.InternalCall)]
-        internal static extern unsafe void godot_icall_Object_ConnectEventSignal(IntPtr obj,
-            godot_string_name* eventSignal);
     }
 }
diff --git a/modules/mono/glue/GodotSharp/GodotSharp/Core/SignalAwaiter.cs b/modules/mono/glue/GodotSharp/GodotSharp/Core/SignalAwaiter.cs
index fd6636e410..62dec81582 100644
--- a/modules/mono/glue/GodotSharp/GodotSharp/Core/SignalAwaiter.cs
+++ b/modules/mono/glue/GodotSharp/GodotSharp/Core/SignalAwaiter.cs
@@ -1,5 +1,4 @@
 using System;
-using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 using Godot.NativeInterop;
 
@@ -13,14 +12,10 @@ namespace Godot
 
         public SignalAwaiter(Object source, StringName signal, Object target)
         {
-            godot_icall_SignalAwaiter_connect(Object.GetPtr(source), ref signal.NativeValue,
+            NativeFuncs.godotsharp_internal_signal_awaiter_connect(Object.GetPtr(source), ref signal.NativeValue,
                 Object.GetPtr(target), GCHandle.ToIntPtr(GCHandle.Alloc(this)));
         }
 
-        [MethodImpl(MethodImplOptions.InternalCall)]
-        internal static extern Error godot_icall_SignalAwaiter_connect(IntPtr source, ref godot_string_name signal,
-            IntPtr target, IntPtr awaiterHandlePtr);
-
         public bool IsCompleted => _completed;
 
         public void OnCompleted(Action action)
@@ -32,30 +27,38 @@ namespace Godot
 
         public IAwaiter<object[]> GetAwaiter() => this;
 
-        internal static unsafe void SignalCallback(IntPtr awaiterGCHandlePtr,
-            godot_variant** args, int argCount,
-            bool* r_awaiterIsNull)
+        [UnmanagedCallersOnly]
+        internal static unsafe void SignalCallback(IntPtr awaiterGCHandlePtr, godot_variant** args, int argCount,
+            godot_bool* outAwaiterIsNull)
         {
-            var awaiter = (SignalAwaiter)GCHandle.FromIntPtr(awaiterGCHandlePtr).Target;
-
-            if (awaiter == null)
+            try
             {
-                *r_awaiterIsNull = true;
-                return;
-            }
+                var awaiter = (SignalAwaiter)GCHandle.FromIntPtr(awaiterGCHandlePtr).Target;
+
+                if (awaiter == null)
+                {
+                    *outAwaiterIsNull = true.ToGodotBool();
+                    return;
+                }
 
-            *r_awaiterIsNull = false;
+                *outAwaiterIsNull = false.ToGodotBool();
 
-            awaiter._completed = true;
+                awaiter._completed = true;
 
-            object[] signalArgs = new object[argCount];
+                object[] signalArgs = new object[argCount];
 
-            for (int i = 0; i < argCount; i++)
-                signalArgs[i] = Marshaling.variant_to_mono_object(args[i]);
+                for (int i = 0; i < argCount; i++)
+                    signalArgs[i] = Marshaling.variant_to_mono_object(args[i]);
 
-            awaiter._result = signalArgs;
+                awaiter._result = signalArgs;
 
-            awaiter._action?.Invoke();
+                awaiter._action?.Invoke();
+            }
+            catch (Exception e)
+            {
+                ExceptionUtils.DebugPrintUnhandledException(e);
+                *outAwaiterIsNull = false.ToGodotBool();
+            }
         }
     }
 }
diff --git a/modules/mono/glue/GodotSharp/GodotSharp/GodotSharp.csproj b/modules/mono/glue/GodotSharp/GodotSharp/GodotSharp.csproj
index 6a529de99b..763ded8809 100644
--- a/modules/mono/glue/GodotSharp/GodotSharp/GodotSharp.csproj
+++ b/modules/mono/glue/GodotSharp/GodotSharp/GodotSharp.csproj
@@ -4,7 +4,7 @@
     <OutputPath>bin/$(Configuration)</OutputPath>
     <AppendTargetFrameworkToOutputPath>false</AppendTargetFrameworkToOutputPath>
     <RootNamespace>Godot</RootNamespace>
-    <TargetFramework>netstandard2.1</TargetFramework>
+    <TargetFramework>net5.0</TargetFramework>
     <DocumentationFile>$(OutputPath)/$(AssemblyName).xml</DocumentationFile>
     <EnableDefaultItems>false</EnableDefaultItems>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
@@ -34,6 +34,7 @@
     <Compile Include="Core\Basis.cs" />
     <Compile Include="Core\Bridge\CSharpInstanceBridge.cs" />
     <Compile Include="Core\Bridge\GCHandleBridge.cs" />
+    <Compile Include="Core\Bridge\ManagedCallbacks.cs" />
     <Compile Include="Core\Bridge\ScriptManagerBridge.cs" />
     <Compile Include="Core\Callable.cs" />
     <Compile Include="Core\Color.cs" />
@@ -58,6 +59,7 @@
     <Compile Include="Core\MarshalUtils.cs" />
     <Compile Include="Core\Mathf.cs" />
     <Compile Include="Core\MathfEx.cs" />
+    <Compile Include="Core\NativeInterop\ExceptionUtils.cs" />
     <Compile Include="Core\NativeInterop\InteropUtils.cs" />
     <Compile Include="Core\NativeInterop\NativeFuncs.extended.cs" />
     <Compile Include="Core\NativeInterop\VariantSpanHelpers.cs" />
diff --git a/modules/mono/glue/GodotSharp/GodotSharp/Properties/AssemblyInfo.cs b/modules/mono/glue/GodotSharp/GodotSharp/Properties/AssemblyInfo.cs
index da6f293871..dbd98d0afb 100644
--- a/modules/mono/glue/GodotSharp/GodotSharp/Properties/AssemblyInfo.cs
+++ b/modules/mono/glue/GodotSharp/GodotSharp/Properties/AssemblyInfo.cs
@@ -1,3 +1,4 @@
 using System.Runtime.CompilerServices;
 
 [assembly: InternalsVisibleTo("GodotSharpEditor")]
+[assembly: InternalsVisibleTo("GodotPlugins")]
diff --git a/modules/mono/glue/GodotSharp/GodotSharpEditor/GodotSharpEditor.csproj b/modules/mono/glue/GodotSharp/GodotSharpEditor/GodotSharpEditor.csproj
index 1082c74448..c0c1b91dc9 100644
--- a/modules/mono/glue/GodotSharp/GodotSharpEditor/GodotSharpEditor.csproj
+++ b/modules/mono/glue/GodotSharp/GodotSharpEditor/GodotSharpEditor.csproj
@@ -4,7 +4,7 @@
     <OutputPath>bin/$(Configuration)</OutputPath>
     <AppendTargetFrameworkToOutputPath>false</AppendTargetFrameworkToOutputPath>
     <RootNamespace>Godot</RootNamespace>
-    <TargetFramework>netstandard2.1</TargetFramework>
+    <TargetFramework>net5.0</TargetFramework>
     <DocumentationFile>$(OutputPath)/$(AssemblyName).xml</DocumentationFile>
     <EnableDefaultItems>false</EnableDefaultItems>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>