Port code examples to C# (D)

Includes:
 * Decal
 * Dictionary
 * Directory
 * DisplayServer
 * DTLSServer
 * DynamicFont
 * EditorImportPlugin
 * EditorPlugin
 * EditorScenePostImport
 * EditorScript
 * EditorSettings
 * EditorTranslationParserPlugin
 * Engine
 * Expression

Co-authored-by: Aaron Franke <arnfranke@yahoo.com>

doc/classes/EditorScript.xml

@@ -7,13 +7,28 @@
 		Scripts extending this class and implementing its [method _run] method can be executed from the Script Editor's [b]File > Run[/b] menu option (or by pressing [kbd]Ctrl + Shift + X[/kbd]) while the editor is running. This is useful for adding custom in-editor functionality to Godot. For more complex additions, consider using [EditorPlugin]s instead.
 		[b]Note:[/b] Extending scripts need to have [code]tool[/code] mode enabled.
 		[b]Example script:[/b]
-		[codeblock]
+		[codeblocks]
+		[gdscript]
 		tool
 		extends EditorScript
 
 		func _run():
 		    print("Hello from the Godot Editor!")
-		[/codeblock]
+		[/gdscript]
+		[csharp]
+		using Godot;
+		using System;
+
+		[Tool]
+		public class HelloEditor : EditorScript
+		{
+		    public override void _Run()
+		    {
+		        GD.Print("Hello from the Godot Editor!");
+		    }
+		}
+		[/csharp]
+		[/codeblocks]
 		[b]Note:[/b] The script is run in the Editor context, which means the output is visible in the console window started with the Editor (stdout) instead of the usual Godot [b]Output[/b] dock.
 	</description>
 	<tutorials>