title: Edmx file error when opening object reference not set to an object
body: <p>when I copy my project to another PC I get this error while opening the Edmx file designer mode.</p>
  <pre><code>&lt;edmx:Edmx Version=&quot;2.0&quot; xmlns:edmx=&quot;http://schemas.microsoft.com/ado/2008/10/edmx&quot;&gt;
  </code></pre>
  <p>the first line of my Edmx file is the above code,its showing  object reference not set to an object</p>