title: Do we need to change page headers (Register/Assembly name versions?) when upgrading a SharePoint 2010 webpart to SharePoint 2013?
body: <p>Do we need to change the version numbers of the code present in the head of the page of webpart?</p>
  
  <pre><code>&lt;%@ Assembly Name="$SharePoint.Project.AssemblyFullName$" %&gt;
  &lt;%@ Assembly Name="Microsoft.Web.CommandUI, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %&gt;
  &lt;%@ Register TagPrefix="SharePoint" Namespace="Microsoft.SharePoint.WebControls"
      Assembly="Microsoft.SharePoint, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %&gt;
  &lt;%@ Register TagPrefix="Utilities" Namespace="Microsoft.SharePoint.Utilities" Assembly="Microsoft.SharePoint, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %&gt;
  &lt;%@ Register TagPrefix="asp" Namespace="System.Web.UI" Assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" %&gt;   
  &lt;%@ Register TagPrefix="WebPartPages" Namespace="Microsoft.SharePoint.WebPartPages"
      Assembly="Microsoft.SharePoint, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %&gt;
  &lt;%@ Register Assembly="Microsoft.SharePoint.Publishing, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c"
      Namespace="Microsoft.SharePoint.Publishing.WebControls" TagPrefix="cc2" %&gt;
  &lt;%@ Register Assembly="AjaxControlToolkit, Version=3.0.30930.28736, Culture=neutral, PublicKeyToken=28f01b0e84b6d53e"
      Namespace="AjaxControlToolkit" TagPrefix="cc1" %&gt;
  </code></pre>
  
  <p>Example from 14.0.0.0 to 15.0.0.0?</p>
  
  <p>We have already done:-</p>
  
  <ol>
  <li>Edit .csproj file and add to it -> 15.0</li>
  <li>Go to project properties and set framework as 4.5</li>
  <li>Go to package and under properties of the package set the version to 15.0</li>
  <li>Check each file to do a check for any hive references. You'll need to add a /15/ to 
  these. EG: _layouts/ to _layouts/15/ and also for _images</li>
  <li>Download AJAX version 4.5 and update reference of AJAX dll in project</li>
  <li>Do right click on project and Click Clean to clean solution</li>
  <li>Build the solution, then Deploy your solution</li>
  </ol>