title: The designer could not be shown in VS2010 express
body: <p>I have following class structure:</p>
  
  <pre><code>public partial class SickForm&lt;T&gt; : MyForm where T : class {}
  
  public class MyForm : Form, ExternalAssemblyNamespace.ISomething {}
  </code></pre>
  
  <p>After opening <code>MyForm</code> in designer, everything loads properly. But after opening <code>SickForm</code> in designer, I'm facing this error:</p>
  
  <blockquote>
    <p>The designer could not be shown for this file because none of the classes within it can be designed.  The designer inspected the following classes in the file: </p>
    
    <p>SickForm --- The base class 'MyForm' could not be loaded.  Ensure the assembly has been referenced and that all projects have been built.</p>
  </blockquote>
  
  <p>How to fix this ? This problem occurs while I'm using VS2010 express. In VS2008 express it works ok.</p>