title: Windows Forms - no C# source code?
body: <p>I'm new to Windows Forms.
  I'm not fully understanding why can't I see methods definitions? Am I only allowed to look at declarations?</p>
  
  <p>For example, there is </p>
  
  <pre><code>public class ListBox : ListControl
  </code></pre>
  
  <p>I want to see how its method is working(source code, not Microsoft comments):</p>
  
  <pre><code>public override string ToString();
  </code></pre>
  
  <p>I only see this definition and when I'm pressing "Go to definition", it transfers me to this declaration.</p>
  
  <p>Can someone please explain is System.Windows.Forms code is "hidden" ? Can someone describe what's the idea?</p>