title: How to disable the depth buffer?
body: <p>I don't see a <code>RenderState</code> as a member in the <code>GraphicsDevice</code> class, which is where the functions for disabling the depth buffer used to be. Anyone know how this is done with this new 4.0 API?</p>
  
  <p>It would be great if I could somehow access a full <code>RenderState</code>-like class somewhere..  <code>GraphicsDevice</code> seems to have gotten some of it, but not nearly all!</p>