title: Planning to upgrade VS 2005 to VS 2010
body: <p>I have installed VS 2010 and want to migrate all code written in VS 2005 to VS 2010.</p>
  
  <p>Please note that we do not have VS 2008, all code are in C# 2.0 and Asp.net 2.0 only.</p>
  
  <p>Can anyone please tell me now what all points need to be considered while migrating.</p>
  
  <h3>Update:</h3>
  
  <p>I have set target framework to 2.0 for all of my Libraries and web projects. It complies without any error!</p>
  
  <p>However, when site opens in IE (Set to  default.aspx), it gives me error as below:</p>
  
  <blockquote>
    <p>InternalXmlHelper.vb(9) : error BC30560: 'ExtensionAttribute' is
    ambiguous in the namespace 'System.Runtime.CompilerServices'.</p>
  
  <pre><code>&lt;Global.System.Runtime.CompilerServices.ExtensionAttribute()&gt; _
  </code></pre>
  </blockquote>