Added C# samples to "making plugins" doc (#2328)

* Added C# samples to "making plugins" doc

* Changed class name to CustomNode

tutorials/plugins/editor/making_plugins.rst

@@ -36,8 +36,11 @@ You should end up with a directory structure like this:
 
 Now, open the script editor, click the **File** menu, choose **New TextFile**,
 then navigate to the plugin folder and name the file ``plugin.cfg``.
-Add the following structure to ``plugin.cfg``::
+Add the following structure to ``plugin.cfg``:
 
+.. tabs::
+ .. code-tab:: gdscript GDScript
+ 
     [plugin]
 
     name="My Custom Node"
@@ -46,6 +49,16 @@ Add the following structure to ``plugin.cfg``::
     version="1.0.0"
     script="custom_node.gd"
 
+ .. code-tab:: csharp
+ 
+    [plugin]
+
+    name="My Custom Node"
+    description="A custom node made to extend the Godot Engine."
+    author="Your Name Here"
+    version="1.0.0"
+    script="CustomNode.cs"
+
 This is a simple INI file with metadata about your plugin. You need to set
 the name and description so people can understand what it does. Don't forget
 to add your own name so you can be properly credited. Add a version number
@@ -69,8 +82,9 @@ default GDScript template from your file and replace it with the following
 structure:
 
 .. _doc_making_plugins_template_code:
-.. code-block:: python
-
+.. tabs::
+ .. code-tab:: gdscript GDScript
+ 
     tool
     extends EditorPlugin
 
@@ -82,6 +96,27 @@ structure:
         # Clean-up of the plugin goes here
         pass
 
+ .. code-tab:: csharp
+ 
+    #if TOOLS
+    using Godot;
+    using System;
+
+    [Tool]
+    public class CustomNode : EditorPlugin
+    {
+        public override void _EnterTree()
+        {
+            // Initialization of the plugin goes here
+        }
+
+        public override void _ExitTree()
+        {
+            // Initialization of the plugin goes here
+        }
+    }
+    #endif
+
 This is a good template to use when creating new plugins.
 
 A custom node
@@ -103,8 +138,11 @@ the ``tool`` keyword, it can be added so the script runs in the editor.
 For this tutorial, we'll create a simple button that prints a message when
 clicked. For that, we'll need a simple script that extends from
 :ref:`class_Button`. It could also extend
-:ref:`class_BaseButton` if you prefer::
+:ref:`class_BaseButton` if you prefer:
 
+.. tabs::
+ .. code-tab:: gdscript GDScript
+ 
     tool
     extends Button
 
@@ -114,7 +152,26 @@ clicked. For that, we'll need a simple script that extends from
     func clicked():
         print("You clicked me!")
 
-That's it for our basic button. You can save this as ``button.gd`` inside the
+ .. code-tab:: csharp
+ 
+    using Godot;
+    using System;
+
+    [Tool]
+    public class MyButton : Button
+    {
+        public override void _EnterTree()
+        {
+            Connect("pressed", this, "clicked");
+        }
+
+        public void clicked()
+        {
+            GD.Print("You clicked me!");
+        }
+    }
+
+That's it for our basic button. You can save this as ``my_button.gd`` inside the
 plugin folder. You'll also need a 16×16 icon to show in the scene tree. If you
 don't have one, you can grab the default one from the engine and save it in your
 `addons/my_custom_node` folder as `icon.png`, or use the default Godot logo
@@ -123,21 +180,51 @@ don't have one, you can grab the default one from the engine and save it in your
 .. image:: img/making_plugins-custom_node_icon.png
 
 Now, we need to add it as a custom type so it shows on the **Create New Node**
-dialog. For that, change the ``custom_node.gd`` script to the following::
+dialog. For that, change the ``custom_node.gd`` script to the following:
 
+.. tabs::
+ .. code-tab:: gdscript GDScript
+ 
     tool
     extends EditorPlugin
 
     func _enter_tree():
         # Initialization of the plugin goes here
         # Add the new type with a name, a parent type, a script and an icon
-        add_custom_type("MyButton", "Button", preload("button.gd"), preload("icon.png"))
+        add_custom_type("MyButton", "Button", preload("my_button.gd"), preload("icon.png"))
 
     func _exit_tree():
         # Clean-up of the plugin goes here
         # Always remember to remove it from the engine when deactivated
         remove_custom_type("MyButton")
 
+ .. code-tab:: csharp
+ 
+    #if TOOLS
+    using Godot;
+    using System;
+
+    [Tool]
+    public class CustomNode : EditorPlugin
+    {
+        public override void _EnterTree()
+        {
+            // Initialization of the plugin goes here
+            // Add the new type with a name, a parent type, a script and an icon
+            var script = GD.Load<Script>("addons/MyButton.cs");
+            var texture = GD.Load<Texture>("icon.png");
+            AddCustomType("MyButton", "Button", script, texture);
+        }
+
+        public override void _ExitTree()
+        {
+            // Clean-up of the plugin goes here
+            // Always remember to remove it from the engine when deactivated
+            RemoveCustomType("MyButton");
+        }
+    }
+    #endif
+
 With that done, the plugin should already be available in the plugin list in the
 **Project Settings**, so activate it as explained in `Checking the results`_.
 
@@ -160,8 +247,11 @@ based on Control, so they are created in a way similar to usual GUI scenes.
 
 Creating a custom dock is done just like a custom node. Create a new
 ``plugin.cfg`` file in the ``addons/my_custom_dock`` folder, then
-add the following content to it::
+add the following content to it:
 
+.. tabs::
+ .. code-tab:: gdscript GDScript
+ 
     [plugin]
 
     name="My Custom Dock"
@@ -170,6 +260,16 @@ add the following content to it::
     version="1.0"
     script="custom_dock.gd"
 
+ .. code-tab:: csharp
+ 
+    [plugin]
+
+    name="My Custom Dock"
+    description="A custom dock made so I can learn how to make plugins."
+    author="Your Name Here"
+    version="1.0"
+    script="CustomDock.cs"
+
 Then create the script ``custom_dock.gd`` in the same folder. Fill it with the
 :ref:`template we've seen before <doc_making_plugins_template_code>` to get a
 good start.
@@ -194,8 +294,11 @@ then add it as a dock in the editor. For this, you can rely on the function
 You need to select a dock position and define the control to add
 (which is the scene you just created). Don't forget to
 **remove the dock** when the plugin is deactivated.
-The script could look like this::
+The script could look like this:
 
+.. tabs::
+ .. code-tab:: gdscript GDScript
+ 
     tool
     extends EditorPlugin
 
@@ -218,6 +321,34 @@ The script could look like this::
          # Erase the control from the memory
         dock.free()
 
+ .. code-tab:: csharp
+ 
+    #if TOOLS
+    using Godot;
+    using System;
+
+    [Tool]
+    public class CustomDock : EditorPlugin
+    {
+        Control dock;
+    
+        public override void _EnterTree()
+        {
+            dock = (Control)GD.Load<PackedScene>("addons/my_custom_dock/my_dock.tscn").Instance();
+            AddControlToDock(DockSlot.LeftUl, dock);
+        }
+
+        public override void _ExitTree()
+        {
+            // Clean-up of the plugin goes here
+            // Remove the dock
+            RemoveControlFromDocks(dock);
+            // Erase the control from the memory
+            dock.Free();
+        }
+    }
+    #endif
+
 Note that, while the dock will initially appear at its specified position,
 the user can freely change its position and save the resulting layout.