XNA C＃代码问题

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework;

namespace Sleyser1
{

public class Hud
{
    GraphicsDeviceManager graphics;
    SpriteBatch spriteBatch;

    Texture2D tempHUD;
    Rectangle viewportRect;

    SpriteFont HUD;
    Vector2 FontPos;
    Vector2 FontPos2;

    public void Hud()
    {
        HUD = Content.Load<SpriteFont>(\"HUD\");
        FontPos = new Vector2(40, 20);
        FontPos2 = new Vector2(150, 20);

        spriteBatch.Begin(SpriteSortMode.Deferred, BlendState.AlphaBlend, null, null, null);

        spriteBatch.Draw(tempHUD, viewportRect, Color.White);

        string output = \"Health:\";
        string output2 = \"Magic:\";
        Vector2 FontOrigin = HUD.MeasureString(output) / 2;
        spriteBatch.DrawString(HUD, output, FontPos, Color.Red, 0, FontOrigin, 1.0f, SpriteEffects.None, 0.5f);
        spriteBatch.DrawString(HUD, output2, FontPos2, Color.Blue, 0, FontOrigin, 1.0f, SpriteEffects.None, 0.5f);

        spriteBatch.End();

    }
}
}

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


        base.Draw(gameTime);
    }