Edited it to clarify it a bit per jjags comment.
You can do it one of four ways.
1) Pass the game and content manager creating the spritebatch in that class. (long story short not a good idea for the same reason you're graphicsdevice isn't valid by default in you're class)
2) Do the above but create them in game1 first then pass that and store the references to a static class that you can call anywere instead of start.
Then in start or anywere else you can call to the static class references i ussually do that cause its simple.
3) Same as two but just pass the stuff directly to you're class from game1 either to use directly or pass and save the references and use them in the class.
4) Use a GameComponent its basically passing game1 around via passing (this) i don't use the component though it might be simpler for you link at the bottom.
Since what you are trying to do looks most like option 3
In Game1 just pass the graphics device the initialized spriteBatch and the content manager.
protected override void LoadContent()
spriteBatch = new SpriteBatch(GraphicsDevice);
start.LoadContent(GraphicsDevice, spriteBatch, Content);
protected override void Draw(GameTime gameTime)
In your start class.
You need to add the using directives same as game 1 to the very top of the class file.
Then add the following un-instantiated object references into the start class.
public GraphicsDevice = device;
public SpriteBatch spriteBatch;
public Microsoft.Xna.Framework.Content.ContentManager Content;
public Texture2D texture;
In you're loadcontent method in start.cs you need to make the following changes.
protected void LoadContent(GraphicsDevice device, SpriteBatch spriteBatch, Microsoft.Xna.Framework.Content.ContentManager Content)
this.device = device;
this.spriteBatch = spriteBatch;
this.Content = Content;
// now you can load with content here.
texture = Content.Load<Texture2D>("Art/Background/titleimg");
As well as start.draw
public void Draw(GameTime gameTime)
spriteBatch.Draw(texture, new Rectangle(0, 0, 1024, 576), Color.White);
here is a overview for a game component.