title: Nested control not copying
body: <p>I have the following class.    </p>
  
  <pre><code> class dgv
   {
       public class DataGridViewEnter : DataGridView
       {
           // Some Properties and methods here...
       }
  </code></pre>
  
  <p>This class is found in two projects exactly the same code.
  In project A ( I have acquired it from the internet) the DataGridViewEnter is visually on form that belongs to project A. If I try to copy it to a form in project B it does not appear in the form.
  I am sure this because of the structure of the classes,what is the problem? how can I solve it ?</p>