update c# class examples

tutorials/physics/kinematic_character_2d.rst

@@ -64,9 +64,8 @@ or lose precision if the frame rate is too high or too low.
  .. code-tab:: csharp
 
     using Godot;
-    using System;
 
-    public class PhysicsScript : CharacterBody2D
+    public partial class PhysicsScript : CharacterBody2D
     {
         public override void _PhysicsProcess(float delta)
         {
@@ -128,9 +127,8 @@ So, let's move our sprite downwards until it hits the floor:
  .. code-tab:: csharp
 
     using Godot;
-    using System;
 
-    public class PhysicsScript : CharacterBody2D
+    public partial class PhysicsScript : CharacterBody2D
     {
         public override void _PhysicsProcess(float delta)
         {
@@ -162,9 +160,8 @@ little more like a regular game character:
  .. code-tab:: csharp
 
     using Godot;
-    using System;
 
-    public class PhysicsScript : CharacterBody2D
+    public partial class PhysicsScript : CharacterBody2D
     {
         const float gravity = 200.0f;
         Vector2 velocity;
@@ -213,9 +210,8 @@ This adds basic support for walking when pressing left and right:
  .. code-tab:: csharp
 
     using Godot;
-    using System;
 
-    public class PhysicsScript : CharacterBody2D
+    public partial class PhysicsScript : CharacterBody2D
     {
         const float gravity = 200.0f;
         const int walkSpeed = 200;

tutorials/physics/physics_introduction.rst

@@ -275,7 +275,9 @@ For example, here is the code for an "Asteroids" style spaceship:
 
  .. code-tab:: csharp
 
-    class Spaceship : RigidBody2D
+    using Godot;
+
+    public partial class Spaceship : RigidBody2D
     {
         private Vector2 _thrust = new Vector2(0, -250);
         private float _torque = 20000;
@@ -366,7 +368,9 @@ occurred:
 
  .. code-tab:: csharp
 
-    class Body : PhysicsBody2D
+    using Godot;
+
+    public partial class Body : PhysicsBody2D
     {
         private Vector2 _velocity = new Vector2(250, 250);
 
@@ -396,7 +400,9 @@ Or to bounce off of the colliding object:
 
  .. code-tab:: csharp
 
-    class Body : PhysicsBody2D
+    using Godot;
+
+    public partial class Body : PhysicsBody2D
     {
         private Vector2 _velocity = new Vector2(250, 250);
 
@@ -455,7 +461,9 @@ the ground (including slopes) and jump when standing on the ground:
 
  .. code-tab:: csharp
 
-    class Body : CharacterBody2D
+    using Godot;
+
+    public partial class Body : CharacterBody2D
     {
         private float _runSpeed = 350;
         private float _jumpSpeed = -1000;

tutorials/physics/ray-casting.rst

@@ -177,7 +177,9 @@ collision object node:
 
  .. code-tab:: csharp
 
-    class Body : CharacterBody2D
+    using Godot;
+
+    public partial class Body : CharacterBody2D
     {
         public override void _PhysicsProcess(float delta)
         {
@@ -211,7 +213,9 @@ member variable:
 
  .. code-tab:: csharp
 
-    class Body : CharacterBody2D
+    using Godot;
+
+    public partial class Body : CharacterBody2D
     {
         public override void _PhysicsProcess(float delta)
         {

tutorials/physics/rigid_body.rst

@@ -50,7 +50,9 @@ Here is a custom ``look_at()`` method that will work reliably with rigid bodies:
 
  .. code-tab:: csharp
 
-    class Body : RigidBody
+    using Godot;
+
+    public partial class Body : RigidBody3D
     {
         private void LookFollow(PhysicsDirectBodyState state, Transform3D currentTransform, Vector3 targetPosition)
         {

tutorials/physics/using_area_2d.rst

@@ -78,7 +78,9 @@ use ``area_entered``. However, let's assume our player is a ``CharacterBody2D``
 
  .. code-tab:: csharp
 
-    public class Coin : Area2D
+    using Godot;
+
+    public partial class Coin : Area2D
     {
 
         public void OnCoinBodyEntered(PhysicsBody2D body)

tutorials/physics/using_character_body_2d.rst

@@ -254,9 +254,8 @@ Attach a script to the CharacterBody2D and add the following code:
  .. code-tab:: csharp
 
     using Godot;
-    using System;
 
-    public class KBExample : CharacterBody2D
+    public partial class KBExample : CharacterBody2D
     {
         public int Speed = 250;
         private Vector2 _velocity = new Vector2();
@@ -358,9 +357,8 @@ uses the mouse pointer. Here is the code for the Player, using ``move_and_slide(
  .. code-tab:: csharp
 
     using Godot;
-    using System;
 
-    public class KBExample : CharacterBody2D
+    public partial class KBExample : CharacterBody2D
     {
         private PackedScene _bullet = (PackedScene)GD.Load("res://Bullet.tscn");
         public int Speed = 200;
@@ -434,9 +432,8 @@ And the code for the Bullet:
  .. code-tab:: csharp
 
     using Godot;
-    using System;
 
-    public class Bullet : CharacterBody2D
+    public partial class Bullet : CharacterBody2D
     {
         public int Speed = 750;
         private Vector2 _velocity = new Vector2();
@@ -531,9 +528,8 @@ Here's the code for the player body:
  .. code-tab:: csharp
 
     using Godot;
-    using System;
 
-    public class KBExample : CharacterBody2D
+    public partial class KBExample : CharacterBody2D
     {
         [Export] public int RunSpeed = 100;
         [Export] public int JumpSpeed = -400;