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C#-Quelltext

public class Game1 : Microsoft.Xna.Framework.Game     { 
        GraphicsDeviceManager graphics; 
        SpriteBatch spriteBatch; 
        private IState currentState; 
      
        public Game1() 
        { 
            graphics = new GraphicsDeviceManager(this); 
            Content.RootDirectory = "Content"; 
        } 
        
        protected override void Initialize() 
        { 
            currentState = new Intro(); 
            base.Initialize(); 
        } 

        protected override void LoadContent() 
        {        
            spriteBatch = new SpriteBatch(GraphicsDevice); 
        } 
      
        protected override void Update(GameTime gameTime) 
        { 
            currentState.Update();          
            base.Update(gameTime); 
        } 

        protected override void Draw(GameTime gameTime) 
        { 
            GraphicsDevice.Clear(Color.CornflowerBlue); 
            spriteBatch.Begin(); 
            currentState.Render(); 
            spriteBatch.End(); 
            
            base.Draw(gameTime); 
        } 
    } 

C#-Quelltext

public interface IState         { 
            void Load(); 
            void Update(); 
            void Render(); 
        } 

C#-Quelltext

public class Intro : IState     { 
        private IState currentState; 
        Texture2D Titelbildschirm; 

        public void Load(ContentManager content) 
        { 
           Titelbildschirm = content.Load<Texture2D>("gruft"); 
        } 

        public void Update() 
        { 
            KeyboardState kbState = Keyboard.GetState(); 
            if (kbState.IsKeyDown(Keys.Space)) 
              currentState = new Menu();          
        } 

        public void Render(SpriteBatch batch) 
        { 
            batch.Begin(); 
            batch.Draw(Titelbildschirm, new Rectangle(0, 0, 1280, 720), Color.White); 
            batch.End(); 
        } 
    } 

C#-Quelltext

public class Menu:IState   { 
    private IState currentState; 
    private Game1 exit; 
    Texture2D Auswahlbildschirm; 

    public void Load(ContentManager content) 
    { 
        Auswahlbildschirm = content.Load<Texture2D>("menubild"); 
    } 

    public void Update() 
    { 
        KeyboardState kbState = Keyboard.GetState(); 
        if (kbState.IsKeyDown(Keys.Enter)) 
            currentState = new Hauptspiel(); 
        if (kbState.IsKeyDown(Keys.Escape)) 
            exit.Exit(); 
    } 

    public void Render(SpriteBatch batch) 
    { 
        batch.Begin(); 
        batch.Draw(Auswahlbildschirm, new Rectangle(0, 0, 1280, 720), Color.White); 
        batch.End(); 
    } 
} 

C#-Quelltext

public class Hauptspiel : IState     { 
        private IState currentState; 
        private Game1 exit; 
        Texture2D Spielbildschirm; 

        public void Load(ContentManager content) 
        { 
            Spielbildschirm = content.Load<Texture2D>("hauszombie"); 
        } 

        public void Update() 
        { 
            KeyboardState kbState = Keyboard.GetState(); 
            if (kbState.IsKeyDown(Keys.Escape)) 
                exit.Exit(); 
        } 

        public void Render(SpriteBatch batch) 
        { 
            batch.Begin(); 
            batch.Draw(Spielbildschirm, new Rectangle(0, 0, 1280, 720), Color.White); 
            batch.End(); 
        } 
    }