C#: Add marshalling support for IEnumerable and IDictionary

Added constructor that takes IEnumerable for Array and IEnumerable<T> for Array<T>.
Added constructor that takes IDictionary for Dictionary and IDictionary<TKey, TValue> for Dictionary<TKey, TValue>.

11 files changed, 240 insertions, 47 deletions

diff --git a/modules/mono/csharp_script.cpp b/modules/mono/csharp_script.cpp
index dfdb4a0b3a..598adae5ca 100644
--- a/modules/mono/csharp_script.cpp
+++ b/modules/mono/csharp_script.cpp
@@ -571,7 +571,7 @@ Vector<ScriptLanguage::StackInfo> CSharpLanguage::stack_trace_get_info(MonoObjec
 
 	MonoException *exc = NULL;
 
-	MonoArray *frames = invoke_method_thunk(CACHED_METHOD_THUNK(System_Diagnostics_StackTrace, GetFrames), p_stack_trace, (MonoObject **)&exc);
+	MonoArray *frames = invoke_method_thunk(CACHED_METHOD_THUNK(System_Diagnostics_StackTrace, GetFrames), p_stack_trace, &exc);
 
 	if (exc) {
 		GDMonoUtils::debug_print_unhandled_exception(exc);
@@ -595,7 +595,7 @@ Vector<ScriptLanguage::StackInfo> CSharpLanguage::stack_trace_get_info(MonoObjec
 		MonoString *file_name;
 		int file_line_num;
 		MonoString *method_decl;
-		invoke_method_thunk(get_sf_info, frame, &file_name, &file_line_num, &method_decl, (MonoObject **)&exc);
+		invoke_method_thunk(get_sf_info, frame, &file_name, &file_line_num, &method_decl, &exc);
 
 		if (exc) {
 			GDMonoUtils::debug_print_unhandled_exception(exc);
@@ -625,7 +625,7 @@ void CSharpLanguage::frame() {
 
 			if (task_scheduler) {
 				MonoException *exc = NULL;
-				invoke_method_thunk(CACHED_METHOD_THUNK(GodotTaskScheduler, Activate), task_scheduler, (MonoObject **)&exc);
+				invoke_method_thunk(CACHED_METHOD_THUNK(GodotTaskScheduler, Activate), task_scheduler, &exc);
 
 				if (exc) {
 					GDMonoUtils::debug_unhandled_exception(exc);
diff --git a/modules/mono/glue/Managed/Files/Array.cs b/modules/mono/glue/Managed/Files/Array.cs
index 0a0891296b..2277c7bf18 100644
--- a/modules/mono/glue/Managed/Files/Array.cs
+++ b/modules/mono/glue/Managed/Files/Array.cs
@@ -38,6 +38,14 @@ namespace Godot.Collections
             safeHandle = new ArraySafeHandle(godot_icall_Array_Ctor());
         }
 
+        public Array(IEnumerable collection) : this()
+        {
+            if (collection == null)
+                throw new NullReferenceException($"Parameter '{nameof(collection)} cannot be null.'");
+
+            MarshalUtils.EnumerableToArray(collection, GetPtr());
+        }
+
         internal Array(ArraySafeHandle handle)
         {
             safeHandle = handle;
@@ -201,6 +209,14 @@ namespace Godot.Collections
             objectArray = new Array();
         }
 
+        public Array(IEnumerable<T> collection)
+        {
+            if (collection == null)
+                throw new NullReferenceException($"Parameter '{nameof(collection)} cannot be null.'");
+
+            objectArray = new Array(collection);
+        }
+
         public Array(Array array)
         {
             objectArray = array;
diff --git a/modules/mono/glue/Managed/Files/Dictionary.cs b/modules/mono/glue/Managed/Files/Dictionary.cs
index b89851f246..af1782b79a 100644
--- a/modules/mono/glue/Managed/Files/Dictionary.cs
+++ b/modules/mono/glue/Managed/Files/Dictionary.cs
@@ -40,6 +40,14 @@ namespace Godot.Collections
             safeHandle = new DictionarySafeHandle(godot_icall_Dictionary_Ctor());
         }
 
+        public Dictionary(IDictionary dictionary) : this()
+        {
+            if (dictionary == null)
+                throw new NullReferenceException($"Parameter '{nameof(dictionary)} cannot be null.'");
+
+            MarshalUtils.IDictionaryToDictionary(dictionary, GetPtr());
+        }
+
         internal Dictionary(DictionarySafeHandle handle)
         {
             safeHandle = handle;
@@ -255,6 +263,23 @@ namespace Godot.Collections
             objectDict = new Dictionary();
         }
 
+        public Dictionary(IDictionary<TKey, TValue> dictionary)
+        {
+            objectDict = new Dictionary();
+
+            if (dictionary == null)
+                throw new NullReferenceException($"Parameter '{nameof(dictionary)} cannot be null.'");
+
+            // TODO: Can be optimized
+
+            IntPtr godotDictionaryPtr = GetPtr();
+
+            foreach (KeyValuePair<TKey, TValue> entry in dictionary)
+            {
+                Dictionary.godot_icall_Dictionary_Add(godotDictionaryPtr, entry.Key, entry.Value);
+            }
+        }
+
         public Dictionary(Dictionary dictionary)
         {
             objectDict = dictionary;
diff --git a/modules/mono/glue/Managed/Files/MarshalUtils.cs b/modules/mono/glue/Managed/Files/MarshalUtils.cs
index f7699a15bf..c67cda55bf 100644
--- a/modules/mono/glue/Managed/Files/MarshalUtils.cs
+++ b/modules/mono/glue/Managed/Files/MarshalUtils.cs
@@ -1,18 +1,54 @@
 using System;
-using Godot.Collections;
+using System.Collections;
 
 namespace Godot
 {
+    using Array = Godot.Collections.Array;
+    using Dictionary = Godot.Collections.Dictionary;
+
     static class MarshalUtils
     {
-        static bool IsArrayGenericType(Type type)
+        static bool TypeIsGenericArray(Type type)
+        {
+            return type.GetGenericTypeDefinition() == typeof(Godot.Collections.Array<>);
+        }
+
+        static bool TypeIsGenericDictionary(Type type)
+        {
+            return type.GetGenericTypeDefinition() == typeof(Godot.Collections.Dictionary<,>);
+        }
+
+        // TODO: EnumerableToArray and IDictionaryToDictionary can be optimized
+
+        internal static void EnumerableToArray(IEnumerable enumerable, IntPtr godotArrayPtr)
         {
-            return type.GetGenericTypeDefinition() == typeof(Array<>);
+            if (enumerable is ICollection collection)
+            {
+                int count = collection.Count;
+
+                object[] tempArray = new object[count];
+                collection.CopyTo(tempArray, 0);
+
+                for (int i = 0; i < count; i++)
+                {
+                    Array.godot_icall_Array_Add(godotArrayPtr, tempArray[i]);
+                }
+            }
+            else
+            {
+                foreach (object element in enumerable)
+                {
+                    Array.godot_icall_Array_Add(godotArrayPtr, element);
+                }
+            }
         }
 
-        static bool IsDictionaryGenericType(Type type)
+        internal static void IDictionaryToDictionary(IDictionary dictionary, IntPtr godotDictionaryPtr)
         {
-            return type.GetGenericTypeDefinition() == typeof(Dictionary<, >);
+            foreach (DictionaryEntry entry in dictionary)
+            {
+                Dictionary.godot_icall_Dictionary_Add(godotDictionaryPtr, entry.Key, entry.Value);
+            }
         }
     }
 }
diff --git a/modules/mono/mono_gd/gd_mono_class.cpp b/modules/mono/mono_gd/gd_mono_class.cpp
index 92324d73f9..d58f675d19 100644
--- a/modules/mono/mono_gd/gd_mono_class.cpp
+++ b/modules/mono/mono_gd/gd_mono_class.cpp
@@ -260,6 +260,11 @@ bool GDMonoClass::has_fetched_method_unknown_params(const StringName &p_name) {
 	return get_fetched_method_unknown_params(p_name) != NULL;
 }
 
+bool GDMonoClass::implements_interface(GDMonoClass *p_interface) {
+
+	return mono_class_implements_interface(mono_class, p_interface->get_mono_ptr());
+}
+
 GDMonoMethod *GDMonoClass::get_method(const StringName &p_name, int p_params_count) {
 
 	MethodKey key = MethodKey(p_name, p_params_count);
diff --git a/modules/mono/mono_gd/gd_mono_class.h b/modules/mono/mono_gd/gd_mono_class.h
index 4af909450e..249422b844 100644
--- a/modules/mono/mono_gd/gd_mono_class.h
+++ b/modules/mono/mono_gd/gd_mono_class.h
@@ -135,6 +135,8 @@ public:
 	void fetch_attributes();
 	void fetch_methods_with_godot_api_checks(GDMonoClass *p_native_base);
 
+	bool implements_interface(GDMonoClass *p_interface);
+
 	GDMonoMethod *get_method(const StringName &p_name, int p_params_count = 0);
 	GDMonoMethod *get_method(MonoMethod *p_raw_method);
 	GDMonoMethod *get_method(MonoMethod *p_raw_method, const StringName &p_name);
diff --git a/modules/mono/mono_gd/gd_mono_field.cpp b/modules/mono/mono_gd/gd_mono_field.cpp
index 5e9d4db122..50a7af4b99 100644
--- a/modules/mono/mono_gd/gd_mono_field.cpp
+++ b/modules/mono/mono_gd/gd_mono_field.cpp
@@ -313,6 +313,18 @@ void GDMonoField::set_value_from_variant(MonoObject *p_object, const Variant &p_
 				break;
 			}
 
+			if (type_class->implements_interface(CACHED_CLASS(System_Collections_IDictionary))) {
+				MonoObject *managed = GDMonoUtils::create_managed_from(p_value.operator Dictionary(), CACHED_CLASS(Dictionary));
+				mono_field_set_value(p_object, mono_field, managed);
+				break;
+			}
+
+			if (type_class->implements_interface(CACHED_CLASS(System_Collections_IEnumerable))) {
+				MonoObject *managed = GDMonoUtils::create_managed_from(p_value.operator Array(), CACHED_CLASS(Array));
+				mono_field_set_value(p_object, mono_field, managed);
+				break;
+			}
+
 			ERR_EXPLAIN(String() + "Attempted to set the value of a field of unmarshallable type: " + type_class->get_name());
 			ERR_FAIL();
 		} break;
@@ -422,8 +434,8 @@ void GDMonoField::set_value_from_variant(MonoObject *p_object, const Variant &p_
 
 			MonoException *exc = NULL;
 
-			GDMonoUtils::IsDictionaryGenericType type_is_dict = CACHED_METHOD_THUNK(MarshalUtils, IsDictionaryGenericType);
-			MonoBoolean is_dict = invoke_method_thunk(type_is_dict, (MonoObject *)reftype, (MonoObject **)&exc);
+			GDMonoUtils::TypeIsGenericDictionary type_is_dict = CACHED_METHOD_THUNK(MarshalUtils, TypeIsGenericDictionary);
+			MonoBoolean is_dict = invoke_method_thunk(type_is_dict, (MonoObject *)reftype, &exc);
 			UNLIKELY_UNHANDLED_EXCEPTION(exc);
 
 			if (is_dict) {
@@ -434,8 +446,8 @@ void GDMonoField::set_value_from_variant(MonoObject *p_object, const Variant &p_
 
 			exc = NULL;
 
-			GDMonoUtils::IsArrayGenericType type_is_array = CACHED_METHOD_THUNK(MarshalUtils, IsArrayGenericType);
-			MonoBoolean is_array = invoke_method_thunk(type_is_array, (MonoObject *)reftype, (MonoObject **)&exc);
+			GDMonoUtils::TypeIsGenericArray type_is_array = CACHED_METHOD_THUNK(MarshalUtils, TypeIsGenericArray);
+			MonoBoolean is_array = invoke_method_thunk(type_is_array, (MonoObject *)reftype, &exc);
 			UNLIKELY_UNHANDLED_EXCEPTION(exc);
 
 			if (is_array) {
@@ -443,6 +455,18 @@ void GDMonoField::set_value_from_variant(MonoObject *p_object, const Variant &p_
 				mono_field_set_value(p_object, mono_field, managed);
 				break;
 			}
+
+			if (type.type_class->implements_interface(CACHED_CLASS(System_Collections_IDictionary))) {
+				MonoObject *managed = GDMonoUtils::create_managed_from(p_value.operator Dictionary(), CACHED_CLASS(Dictionary));
+				mono_field_set_value(p_object, mono_field, managed);
+				break;
+			}
+
+			if (type.type_class->implements_interface(CACHED_CLASS(System_Collections_IEnumerable))) {
+				MonoObject *managed = GDMonoUtils::create_managed_from(p_value.operator Array(), CACHED_CLASS(Array));
+				mono_field_set_value(p_object, mono_field, managed);
+				break;
+			}
 		} break;
 
 		default: {
diff --git a/modules/mono/mono_gd/gd_mono_marshal.cpp b/modules/mono/mono_gd/gd_mono_marshal.cpp
index 7fe8ae608a..a522917b9e 100644
--- a/modules/mono/mono_gd/gd_mono_marshal.cpp
+++ b/modules/mono/mono_gd/gd_mono_marshal.cpp
@@ -156,14 +156,22 @@ Variant::Type managed_to_variant_type(const ManagedType &p_type) {
 			if (CACHED_CLASS(Array) == type_class) {
 				return Variant::ARRAY;
 			}
+
+			if (type_class->implements_interface(CACHED_CLASS(System_Collections_IDictionary))) {
+				return Variant::DICTIONARY;
+			}
+
+			if (type_class->implements_interface(CACHED_CLASS(System_Collections_IEnumerable))) {
+				return Variant::ARRAY;
+			}
 		} break;
 
 		case MONO_TYPE_GENERICINST: {
 			MonoReflectionType *reftype = mono_type_get_object(SCRIPTS_DOMAIN, p_type.type_class->get_mono_type());
 
 			MonoException *exc = NULL;
-			GDMonoUtils::IsDictionaryGenericType type_is_dict = CACHED_METHOD_THUNK(MarshalUtils, IsDictionaryGenericType);
-			MonoBoolean is_dict = invoke_method_thunk(type_is_dict, (MonoObject *)reftype, (MonoObject **)&exc);
+			GDMonoUtils::TypeIsGenericDictionary type_is_dict = CACHED_METHOD_THUNK(MarshalUtils, TypeIsGenericDictionary);
+			MonoBoolean is_dict = invoke_method_thunk(type_is_dict, (MonoObject *)reftype, &exc);
 			UNLIKELY_UNHANDLED_EXCEPTION(exc);
 
 			if (is_dict) {
@@ -171,13 +179,21 @@ Variant::Type managed_to_variant_type(const ManagedType &p_type) {
 			}
 
 			exc = NULL;
-			GDMonoUtils::IsArrayGenericType type_is_array = CACHED_METHOD_THUNK(MarshalUtils, IsArrayGenericType);
-			MonoBoolean is_array = invoke_method_thunk(type_is_array, (MonoObject *)reftype, (MonoObject **)&exc);
+			GDMonoUtils::TypeIsGenericArray type_is_array = CACHED_METHOD_THUNK(MarshalUtils, TypeIsGenericArray);
+			MonoBoolean is_array = invoke_method_thunk(type_is_array, (MonoObject *)reftype, &exc);
 			UNLIKELY_UNHANDLED_EXCEPTION(exc);
 
 			if (is_array) {
 				return Variant::ARRAY;
 			}
+
+			if (p_type.type_class->implements_interface(CACHED_CLASS(System_Collections_IDictionary))) {
+				return Variant::DICTIONARY;
+			}
+
+			if (p_type.type_class->implements_interface(CACHED_CLASS(System_Collections_IEnumerable))) {
+				return Variant::ARRAY;
+			}
 		} break;
 
 		default: {
@@ -453,6 +469,14 @@ MonoObject *variant_to_mono_object(const Variant *p_var, const ManagedType &p_ty
 			if (CACHED_CLASS(Array) == type_class) {
 				return GDMonoUtils::create_managed_from(p_var->operator Array(), CACHED_CLASS(Array));
 			}
+
+			if (type_class->implements_interface(CACHED_CLASS(System_Collections_IDictionary))) {
+				return GDMonoUtils::create_managed_from(p_var->operator Dictionary(), CACHED_CLASS(Dictionary));
+			}
+
+			if (type_class->implements_interface(CACHED_CLASS(System_Collections_IEnumerable))) {
+				return GDMonoUtils::create_managed_from(p_var->operator Array(), CACHED_CLASS(Array));
+			}
 		} break;
 		case MONO_TYPE_OBJECT: {
 			// Variant
@@ -548,8 +572,8 @@ MonoObject *variant_to_mono_object(const Variant *p_var, const ManagedType &p_ty
 				MonoReflectionType *reftype = mono_type_get_object(SCRIPTS_DOMAIN, p_type.type_class->get_mono_type());
 
 				MonoException *exc = NULL;
-				GDMonoUtils::IsDictionaryGenericType type_is_dict = CACHED_METHOD_THUNK(MarshalUtils, IsDictionaryGenericType);
-				MonoBoolean is_dict = invoke_method_thunk(type_is_dict, (MonoObject *)reftype, (MonoObject **)&exc);
+				GDMonoUtils::TypeIsGenericDictionary type_is_dict = CACHED_METHOD_THUNK(MarshalUtils, TypeIsGenericDictionary);
+				MonoBoolean is_dict = invoke_method_thunk(type_is_dict, (MonoObject *)reftype, &exc);
 				UNLIKELY_UNHANDLED_EXCEPTION(exc);
 
 				if (is_dict) {
@@ -557,13 +581,21 @@ MonoObject *variant_to_mono_object(const Variant *p_var, const ManagedType &p_ty
 				}
 
 				exc = NULL;
-				GDMonoUtils::IsArrayGenericType type_is_array = CACHED_METHOD_THUNK(MarshalUtils, IsArrayGenericType);
-				MonoBoolean is_array = invoke_method_thunk(type_is_array, (MonoObject *)reftype, (MonoObject **)&exc);
+				GDMonoUtils::TypeIsGenericArray type_is_array = CACHED_METHOD_THUNK(MarshalUtils, TypeIsGenericArray);
+				MonoBoolean is_array = invoke_method_thunk(type_is_array, (MonoObject *)reftype, &exc);
 				UNLIKELY_UNHANDLED_EXCEPTION(exc);
 
 				if (is_array) {
 					return GDMonoUtils::create_managed_from(p_var->operator Array(), p_type.type_class);
 				}
+
+				if (p_type.type_class->implements_interface(CACHED_CLASS(System_Collections_IDictionary))) {
+					return GDMonoUtils::create_managed_from(p_var->operator Dictionary(), CACHED_CLASS(Dictionary));
+				}
+
+				if (p_type.type_class->implements_interface(CACHED_CLASS(System_Collections_IEnumerable))) {
+					return GDMonoUtils::create_managed_from(p_var->operator Array(), CACHED_CLASS(Array));
+				}
 			} break;
 		} break;
 	}
@@ -717,17 +749,33 @@ Variant mono_object_to_variant(MonoObject *p_obj) {
 
 			if (CACHED_CLASS(Array) == type_class) {
 				MonoException *exc = NULL;
-				Array *ptr = invoke_method_thunk(CACHED_METHOD_THUNK(Array, GetPtr), p_obj, (MonoObject **)&exc);
+				Array *ptr = invoke_method_thunk(CACHED_METHOD_THUNK(Array, GetPtr), p_obj, &exc);
 				UNLIKELY_UNHANDLED_EXCEPTION(exc);
 				return ptr ? Variant(*ptr) : Variant();
 			}
 
 			if (CACHED_CLASS(Dictionary) == type_class) {
 				MonoException *exc = NULL;
-				Dictionary *ptr = invoke_method_thunk(CACHED_METHOD_THUNK(Dictionary, GetPtr), p_obj, (MonoObject **)&exc);
+				Dictionary *ptr = invoke_method_thunk(CACHED_METHOD_THUNK(Dictionary, GetPtr), p_obj, &exc);
 				UNLIKELY_UNHANDLED_EXCEPTION(exc);
 				return ptr ? Variant(*ptr) : Variant();
 			}
+
+			if (type_class->implements_interface(CACHED_CLASS(System_Collections_IDictionary))) {
+				Dictionary dict;
+				MonoException *exc = NULL;
+				invoke_method_thunk(CACHED_METHOD_THUNK(MarshalUtils, IDictionaryToDictionary), p_obj, &dict, &exc);
+				UNLIKELY_UNHANDLED_EXCEPTION(exc);
+				return dict;
+			}
+
+			if (type_class->implements_interface(CACHED_CLASS(System_Collections_IEnumerable))) {
+				Array array;
+				MonoException *exc = NULL;
+				invoke_method_thunk(CACHED_METHOD_THUNK(MarshalUtils, EnumerableToArray), p_obj, &array, &exc);
+				UNLIKELY_UNHANDLED_EXCEPTION(exc);
+				return array;
+			}
 		} break;
 
 		case MONO_TYPE_GENERICINST: {
@@ -735,8 +783,8 @@ Variant mono_object_to_variant(MonoObject *p_obj) {
 
 			MonoException *exc = NULL;
 
-			GDMonoUtils::IsDictionaryGenericType type_is_dict = CACHED_METHOD_THUNK(MarshalUtils, IsDictionaryGenericType);
-			MonoBoolean is_dict = invoke_method_thunk(type_is_dict, (MonoObject *)reftype, (MonoObject **)&exc);
+			GDMonoUtils::TypeIsGenericDictionary type_is_dict = CACHED_METHOD_THUNK(MarshalUtils, TypeIsGenericDictionary);
+			MonoBoolean is_dict = invoke_method_thunk(type_is_dict, (MonoObject *)reftype, &exc);
 			UNLIKELY_UNHANDLED_EXCEPTION(exc);
 
 			if (is_dict) {
@@ -748,8 +796,8 @@ Variant mono_object_to_variant(MonoObject *p_obj) {
 
 			exc = NULL;
 
-			GDMonoUtils::IsArrayGenericType type_is_array = CACHED_METHOD_THUNK(MarshalUtils, IsArrayGenericType);
-			MonoBoolean is_array = invoke_method_thunk(type_is_array, (MonoObject *)reftype, (MonoObject **)&exc);
+			GDMonoUtils::TypeIsGenericArray type_is_array = CACHED_METHOD_THUNK(MarshalUtils, TypeIsGenericArray);
+			MonoBoolean is_array = invoke_method_thunk(type_is_array, (MonoObject *)reftype, &exc);
 			UNLIKELY_UNHANDLED_EXCEPTION(exc);
 
 			if (is_array) {
@@ -758,6 +806,22 @@ Variant mono_object_to_variant(MonoObject *p_obj) {
 				UNLIKELY_UNHANDLED_EXCEPTION(exc);
 				return *unbox<Array *>(ret);
 			}
+
+			if (type.type_class->implements_interface(CACHED_CLASS(System_Collections_IDictionary))) {
+				Dictionary dict;
+				exc = NULL;
+				invoke_method_thunk(CACHED_METHOD_THUNK(MarshalUtils, IDictionaryToDictionary), p_obj, &dict, &exc);
+				UNLIKELY_UNHANDLED_EXCEPTION(exc);
+				return dict;
+			}
+
+			if (type.type_class->implements_interface(CACHED_CLASS(System_Collections_IEnumerable))) {
+				Array array;
+				exc = NULL;
+				invoke_method_thunk(CACHED_METHOD_THUNK(MarshalUtils, EnumerableToArray), p_obj, &array, &exc);
+				UNLIKELY_UNHANDLED_EXCEPTION(exc);
+				return array;
+			}
 		} break;
 	}
 
diff --git a/modules/mono/mono_gd/gd_mono_utils.cpp b/modules/mono/mono_gd/gd_mono_utils.cpp
index 6cc1c8afc2..6203f7e118 100644
--- a/modules/mono/mono_gd/gd_mono_utils.cpp
+++ b/modules/mono/mono_gd/gd_mono_utils.cpp
@@ -63,6 +63,7 @@ MonoCache mono_cache;
 #define CACHE_FIELD_AND_CHECK(m_class, m_field, m_val) CACHE_AND_CHECK(GDMonoUtils::mono_cache.field_##m_class##_##m_field, m_val)
 #define CACHE_METHOD_AND_CHECK(m_class, m_method, m_val) CACHE_AND_CHECK(GDMonoUtils::mono_cache.method_##m_class##_##m_method, m_val)
 #define CACHE_METHOD_THUNK_AND_CHECK(m_class, m_method, m_val) CACHE_AND_CHECK(GDMonoUtils::mono_cache.methodthunk_##m_class##_##m_method, m_val)
+#define CACHE_PROPERTY_AND_CHECK(m_class, m_property, m_val) CACHE_AND_CHECK(GDMonoUtils::mono_cache.property_##m_class##_##m_property, m_val)
 
 void MonoCache::clear_members() {
 
@@ -81,6 +82,9 @@ void MonoCache::clear_members() {
 	class_String = NULL;
 	class_IntPtr = NULL;
 
+	class_System_Collections_IEnumerable = NULL;
+	class_System_Collections_IDictionary = NULL;
+
 #ifdef DEBUG_ENABLED
 	class_System_Diagnostics_StackTrace = NULL;
 	methodthunk_System_Diagnostics_StackTrace_GetFrames = NULL;
@@ -143,12 +147,15 @@ void MonoCache::clear_members() {
 	methodthunk_GodotObject_Dispose = NULL;
 	methodthunk_Array_GetPtr = NULL;
 	methodthunk_Dictionary_GetPtr = NULL;
-	methodthunk_MarshalUtils_IsArrayGenericType = NULL;
-	methodthunk_MarshalUtils_IsDictionaryGenericType = NULL;
 	methodthunk_SignalAwaiter_SignalCallback = NULL;
 	methodthunk_SignalAwaiter_FailureCallback = NULL;
 	methodthunk_GodotTaskScheduler_Activate = NULL;
 
+	methodthunk_MarshalUtils_TypeIsGenericArray = NULL;
+	methodthunk_MarshalUtils_TypeIsGenericDictionary = NULL;
+	methodthunk_MarshalUtils_EnumerableToArray = NULL;
+	methodthunk_MarshalUtils_IDictionaryToDictionary = NULL;
+
 	task_scheduler_handle = Ref<MonoGCHandle>();
 }
 
@@ -178,6 +185,9 @@ void update_corlib_cache() {
 	CACHE_CLASS_AND_CHECK(String, GDMono::get_singleton()->get_corlib_assembly()->get_class(mono_get_string_class()));
 	CACHE_CLASS_AND_CHECK(IntPtr, GDMono::get_singleton()->get_corlib_assembly()->get_class(mono_get_intptr_class()));
 
+	CACHE_CLASS_AND_CHECK(System_Collections_IEnumerable, GDMono::get_singleton()->get_corlib_assembly()->get_class("System.Collections", "IEnumerable"));
+	CACHE_CLASS_AND_CHECK(System_Collections_IDictionary, GDMono::get_singleton()->get_corlib_assembly()->get_class("System.Collections", "IDictionary"));
+
 #ifdef DEBUG_ENABLED
 	CACHE_CLASS_AND_CHECK(System_Diagnostics_StackTrace, GDMono::get_singleton()->get_corlib_assembly()->get_class("System.Diagnostics", "StackTrace"));
 	CACHE_METHOD_THUNK_AND_CHECK(System_Diagnostics_StackTrace, GetFrames, (StackTrace_GetFrames)CACHED_CLASS(System_Diagnostics_StackTrace)->get_method_thunk("GetFrames"));
@@ -242,12 +252,15 @@ void update_godot_api_cache() {
 	CACHE_METHOD_THUNK_AND_CHECK(GodotObject, Dispose, (GodotObject_Dispose)CACHED_CLASS(GodotObject)->get_method_thunk("Dispose", 0));
 	CACHE_METHOD_THUNK_AND_CHECK(Array, GetPtr, (Array_GetPtr)GODOT_API_NS_CLAS(BINDINGS_NAMESPACE_COLLECTIONS, Array)->get_method_thunk("GetPtr", 0));
 	CACHE_METHOD_THUNK_AND_CHECK(Dictionary, GetPtr, (Dictionary_GetPtr)GODOT_API_NS_CLAS(BINDINGS_NAMESPACE_COLLECTIONS, Dictionary)->get_method_thunk("GetPtr", 0));
-	CACHE_METHOD_THUNK_AND_CHECK(MarshalUtils, IsArrayGenericType, (IsArrayGenericType)GODOT_API_CLASS(MarshalUtils)->get_method_thunk("IsArrayGenericType", 1));
-	CACHE_METHOD_THUNK_AND_CHECK(MarshalUtils, IsDictionaryGenericType, (IsDictionaryGenericType)GODOT_API_CLASS(MarshalUtils)->get_method_thunk("IsDictionaryGenericType", 1));
 	CACHE_METHOD_THUNK_AND_CHECK(SignalAwaiter, SignalCallback, (SignalAwaiter_SignalCallback)GODOT_API_CLASS(SignalAwaiter)->get_method_thunk("SignalCallback", 1));
 	CACHE_METHOD_THUNK_AND_CHECK(SignalAwaiter, FailureCallback, (SignalAwaiter_FailureCallback)GODOT_API_CLASS(SignalAwaiter)->get_method_thunk("FailureCallback", 0));
 	CACHE_METHOD_THUNK_AND_CHECK(GodotTaskScheduler, Activate, (GodotTaskScheduler_Activate)GODOT_API_CLASS(GodotTaskScheduler)->get_method_thunk("Activate", 0));
 
+	CACHE_METHOD_THUNK_AND_CHECK(MarshalUtils, TypeIsGenericArray, (TypeIsGenericArray)GODOT_API_CLASS(MarshalUtils)->get_method_thunk("TypeIsGenericArray", 1));
+	CACHE_METHOD_THUNK_AND_CHECK(MarshalUtils, TypeIsGenericDictionary, (TypeIsGenericDictionary)GODOT_API_CLASS(MarshalUtils)->get_method_thunk("TypeIsGenericDictionary", 1));
+	CACHE_METHOD_THUNK_AND_CHECK(MarshalUtils, EnumerableToArray, (EnumerableToArray)GODOT_API_CLASS(MarshalUtils)->get_method_thunk("EnumerableToArray", 2));
+	CACHE_METHOD_THUNK_AND_CHECK(MarshalUtils, IDictionaryToDictionary, (IDictionaryToDictionary)GODOT_API_CLASS(MarshalUtils)->get_method_thunk("IDictionaryToDictionary", 2));
+
 #ifdef DEBUG_ENABLED
 	CACHE_METHOD_THUNK_AND_CHECK(DebuggingUtils, GetStackFrameInfo, (DebugUtils_StackFrameInfo)GODOT_API_CLASS(DebuggingUtils)->get_method_thunk("GetStackFrameInfo", 4));
 #endif
@@ -712,7 +725,7 @@ uint64_t unbox_enum_value(MonoObject *p_boxed, MonoType *p_enum_basetype, bool &
 }
 
 void dispose(MonoObject *p_mono_object, MonoException **r_exc) {
-	invoke_method_thunk(CACHED_METHOD_THUNK(GodotObject, Dispose), p_mono_object, (MonoObject **)r_exc);
+	invoke_method_thunk(CACHED_METHOD_THUNK(GodotObject, Dispose), p_mono_object, r_exc);
 }
 
 } // namespace GDMonoUtils
diff --git a/modules/mono/mono_gd/gd_mono_utils.h b/modules/mono/mono_gd/gd_mono_utils.h
index e88bf1ced9..4ebf47bd17 100644
--- a/modules/mono/mono_gd/gd_mono_utils.h
+++ b/modules/mono/mono_gd/gd_mono_utils.h
@@ -49,18 +49,19 @@
 
 namespace GDMonoUtils {
 
-typedef void (*GodotObject_Dispose)(MonoObject *, MonoObject **);
-typedef Array *(*Array_GetPtr)(MonoObject *, MonoObject **);
-typedef Dictionary *(*Dictionary_GetPtr)(MonoObject *, MonoObject **);
-typedef MonoObject *(*SignalAwaiter_SignalCallback)(MonoObject *, MonoArray *, MonoObject **);
-typedef MonoObject *(*SignalAwaiter_FailureCallback)(MonoObject *, MonoObject **);
-typedef MonoObject *(*GodotTaskScheduler_Activate)(MonoObject *, MonoObject **);
-typedef MonoArray *(*StackTrace_GetFrames)(MonoObject *, MonoObject **);
-typedef MonoBoolean (*IsArrayGenericType)(MonoObject *, MonoObject **);
-typedef MonoBoolean (*IsDictionaryGenericType)(MonoObject *, MonoObject **);
-typedef MonoBoolean (*IsArrayGenericType)(MonoObject *, MonoObject **);
-typedef MonoBoolean (*IsDictionaryGenericType)(MonoObject *, MonoObject **);
-typedef void (*DebugUtils_StackFrameInfo)(MonoObject *, MonoString **, int *, MonoString **, MonoObject **);
+typedef void (*GodotObject_Dispose)(MonoObject *, MonoException **);
+typedef Array *(*Array_GetPtr)(MonoObject *, MonoException **);
+typedef Dictionary *(*Dictionary_GetPtr)(MonoObject *, MonoException **);
+typedef MonoObject *(*SignalAwaiter_SignalCallback)(MonoObject *, MonoArray *, MonoException **);
+typedef MonoObject *(*SignalAwaiter_FailureCallback)(MonoObject *, MonoException **);
+typedef MonoObject *(*GodotTaskScheduler_Activate)(MonoObject *, MonoException **);
+typedef MonoArray *(*StackTrace_GetFrames)(MonoObject *, MonoException **);
+typedef void (*DebugUtils_StackFrameInfo)(MonoObject *, MonoString **, int *, MonoString **, MonoException **);
+
+typedef MonoBoolean (*TypeIsGenericArray)(MonoObject *, MonoException **);
+typedef MonoBoolean (*TypeIsGenericDictionary)(MonoObject *, MonoException **);
+typedef void (*EnumerableToArray)(MonoObject *, Array *, MonoException **);
+typedef void (*IDictionaryToDictionary)(MonoObject *, Dictionary *, MonoException **);
 
 struct MonoCache {
 
@@ -83,6 +84,9 @@ struct MonoCache {
 	GDMonoClass *class_String;
 	GDMonoClass *class_IntPtr;
 
+	GDMonoClass *class_System_Collections_IEnumerable;
+	GDMonoClass *class_System_Collections_IDictionary;
+
 #ifdef DEBUG_ENABLED
 	GDMonoClass *class_System_Diagnostics_StackTrace;
 	StackTrace_GetFrames methodthunk_System_Diagnostics_StackTrace_GetFrames;
@@ -146,12 +150,15 @@ struct MonoCache {
 	GodotObject_Dispose methodthunk_GodotObject_Dispose;
 	Array_GetPtr methodthunk_Array_GetPtr;
 	Dictionary_GetPtr methodthunk_Dictionary_GetPtr;
-	IsArrayGenericType methodthunk_MarshalUtils_IsArrayGenericType;
-	IsDictionaryGenericType methodthunk_MarshalUtils_IsDictionaryGenericType;
 	SignalAwaiter_SignalCallback methodthunk_SignalAwaiter_SignalCallback;
 	SignalAwaiter_FailureCallback methodthunk_SignalAwaiter_FailureCallback;
 	GodotTaskScheduler_Activate methodthunk_GodotTaskScheduler_Activate;
 
+	TypeIsGenericArray methodthunk_MarshalUtils_TypeIsGenericArray;
+	TypeIsGenericDictionary methodthunk_MarshalUtils_TypeIsGenericDictionary;
+	EnumerableToArray methodthunk_MarshalUtils_EnumerableToArray;
+	IDictionaryToDictionary methodthunk_MarshalUtils_IDictionaryToDictionary;
+
 	Ref<MonoGCHandle> task_scheduler_handle;
 
 	bool corlib_cache_updated;
@@ -255,6 +262,7 @@ void dispose(MonoObject *p_mono_object, MonoException **r_exc);
 #define CACHED_FIELD(m_class, m_field) (GDMonoUtils::mono_cache.field_##m_class##_##m_field)
 #define CACHED_METHOD(m_class, m_method) (GDMonoUtils::mono_cache.method_##m_class##_##m_method)
 #define CACHED_METHOD_THUNK(m_class, m_method) (GDMonoUtils::mono_cache.methodthunk_##m_class##_##m_method)
+#define CACHED_PROPERTY(m_class, m_property) (GDMonoUtils::mono_cache.property_##m_class##_##m_property)
 
 #ifdef REAL_T_IS_DOUBLE
 #define REAL_T_MONOCLASS CACHED_CLASS_RAW(double)
diff --git a/modules/mono/signal_awaiter_utils.cpp b/modules/mono/signal_awaiter_utils.cpp
index 5051d83694..5d37e8212f 100644
--- a/modules/mono/signal_awaiter_utils.cpp
+++ b/modules/mono/signal_awaiter_utils.cpp
@@ -100,7 +100,7 @@ Variant SignalAwaiterHandle::_signal_callback(const Variant **p_args, int p_argc
 
 	MonoException *exc = NULL;
 	GD_MONO_BEGIN_RUNTIME_INVOKE;
-	invoke_method_thunk(CACHED_METHOD_THUNK(SignalAwaiter, SignalCallback), get_target(), signal_args, (MonoObject **)&exc);
+	invoke_method_thunk(CACHED_METHOD_THUNK(SignalAwaiter, SignalCallback), get_target(), signal_args, &exc);
 	GD_MONO_END_RUNTIME_INVOKE;
 
 	if (exc) {
@@ -132,7 +132,7 @@ SignalAwaiterHandle::~SignalAwaiterHandle() {
 		if (awaiter) {
 			MonoException *exc = NULL;
 			GD_MONO_BEGIN_RUNTIME_INVOKE;
-			invoke_method_thunk(CACHED_METHOD_THUNK(SignalAwaiter, FailureCallback), awaiter, (MonoObject **)&exc);
+			invoke_method_thunk(CACHED_METHOD_THUNK(SignalAwaiter, FailureCallback), awaiter, &exc);
 			GD_MONO_END_RUNTIME_INVOKE;
 
 			if (exc) {