Monogame:在类中创建绘图函数

using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;

public class Game1 : Game
{
    private GraphicsDeviceManager graphics;
    private SpriteBatch spriteBatch;

    public Game1()
    {
        graphics = new GraphicsDeviceManager(this);
        Content.RootDirectory = "Content";
    }

    protected override void Initialize()
    {
        // 初始化代码
        base.Initialize();
    }

    protected override void LoadContent()
    {
        spriteBatch = new SpriteBatch(GraphicsDevice);
        // 加载资源代码
    }

    protected override void Update(GameTime gameTime)
    {
        // 更新游戏逻辑代码
        base.Update(gameTime);
    }

    protected override void Draw(GameTime gameTime)
    {
        GraphicsDevice.Clear(Color.CornflowerBlue);

        spriteBatch.Begin();
        // 绘制代码
        spriteBatch.End();

        base.Draw(gameTime);
    }
}