title: Is it possible to *retrieve* integer data from shader code?
body: <p>I have a simple question to ask .. Its one of the first things you learn about shaders when using them with XNA that you can pass on variables from C# to the shader code via the Effect.Parameters function. For example:</p>
  
  <p><code>Effect.Parameters["shaderVariable"].SetValue(someValue);</code></p>
  
  <p>In the above line, you're sending the value stored in 'someValue' to the shader variable 'shaderVariable' ..</p>
  
  <p>Can we do the reverse as well ? Like for example, you want to debug the inner workings of a shader code and want to send back some numerical data to your C# application, then is there any similar but opposite relation functional available as well ?</p>