MonoGame draw issue

Game1.cs

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

namespace Game1
{
	public class Game1 : Game
	{
		GraphicsDeviceManager graphics;
		SpriteBatch spriteBatch;
		SpriteFont hudFont;

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

		protected override void Initialize()
		{
			base.Initialize();
		}

		protected override void LoadContent()
		{
			spriteBatch = new SpriteBatch( GraphicsDevice );

			hudFont = Content.Load<SpriteFont>( "HudFont" );
		}

		protected override void UnloadContent()
		{
		}

		protected override void Update( GameTime gameTime )
		{
			if( GamePad.GetState( PlayerIndex.One ).Buttons.Back == ButtonState.Pressed || Keyboard.GetState().IsKeyDown( Keys.Escape ) )
				Exit();

			base.Update( gameTime );
		}

		protected override void Draw( GameTime gameTime )
		{
			GraphicsDevice.Clear( new Color( 255, 0, 255 ) );

			spriteBatch.Begin();
			spriteBatch.DrawString( hudFont, "this is a test", new Vector2( 0, 0 ), Color.Black );
			spriteBatch.End();

			base.Draw( gameTime );
		}
	}
}