Fix various C# exceptions

- Replace `IndexOutOfRangeException` with `ArgumentOutOfRangeException`
- Replace `Exception` with a more specific exception
- Add the parameter name to argument exception
- Update documentation for methods that throw exceptions
- Use `StringBuilder` to build exception messages
- Ensure exception messages end with a period

1 files changed, 1 insertions, 1 deletions

diff --git a/modules/mono/glue/GodotSharp/GodotPlugins/Main.cs b/modules/mono/glue/GodotSharp/GodotPlugins/Main.cs
index dad7464410..8308bada24 100644
--- a/modules/mono/glue/GodotSharp/GodotPlugins/Main.cs
+++ b/modules/mono/glue/GodotSharp/GodotPlugins/Main.cs
@@ -153,7 +153,7 @@ namespace GodotPlugins
                 string assemblyPath = new(nAssemblyPath);
 
                 if (_editorApiAssembly == null)
-                    throw new InvalidOperationException("The Godot editor API assembly is not loaded");
+                    throw new InvalidOperationException("The Godot editor API assembly is not loaded.");
 
                 var (assembly, _) = LoadPlugin(assemblyPath);