title: Asp.net UserControl with Templates is not working inside user controls
body: <p>I have created a real simple templated UserControl and </p>
  
  <p>I can now add this control to my Asp.net WebApplication using:</p>
  
  <pre><code>&lt;components:Box BoxType="Help" Title="Content Title" runat="server"&gt;
      &lt;Content&gt;
          &lt;asp:TextBox runat="Server" ID="txtName"/&gt;
          This is my awesome content!&lt;br /&gt;
          &lt;b&gt;Test&lt;/b&gt;
      &lt;/Content&gt;
  &lt;/components:Box&gt;
  </code></pre>
  
  <p>i can embed this in a page (aspx) but i is not working in usercontrol (ascx). when i use this inside usercontrol, the designer file (.ascx.designer.cs) itself not getting generated.</p>
  
  <p>getting the following error:</p>
  
  <p>Element 'Box' is not a known element. This can occur if there is an error in the webpage, or 
   the web.config file is missing.</p>
  
  <p>Update: sometimes it works! i created couple of controls. it works in some place and it doesnot works in someother place.</p>
  
  <p>Thanks!</p>