Draw Rectangle with XNA

Question

I am working on game. I want to highlight a spot on the screen when something happens.

I created a class to do this for me, and found a bit of code to draw the rect

Answer 1

The SafeArea demo on the XNA Creators Club site has code to do specifically that.

You don't have to create the Texture every frame, just in LoadContent. A very stripped down version of the code from that demo:

public class RectangleOverlay : DrawableGameComponent
{
    SpriteBatch spriteBatch;
    Texture2D dummyTexture;
    Rectangle dummyRectangle;
    Color Colori;

    public RectangleOverlay(Rectangle rect, Color colori, Game game)
        : base(game)
    {
        // Choose a high number, so we will draw on top of other components.
        DrawOrder = 1000;
        dummyRectangle = rect;
        Colori = colori;
    }

    protected override void LoadContent()
    {
        spriteBatch = new SpriteBatch(GraphicsDevice);
        dummyTexture = new Texture2D(GraphicsDevice, 1, 1);
        dummyTexture.SetData(new Color[] { Color.White });
    }

    public override void Draw(GameTime gameTime)
    {
        spriteBatch.Begin();
        spriteBatch.Draw(dummyTexture, dummyRectangle, Colori);
        spriteBatch.End();
    }
}