title: c# GridViewColumns missing assembly reference
body: <p>I am trying to use 'System.Windows.Controls.GridViewColumn' within Visual Studio 2013, .net 4.5, but I am receiving this error :</p>
  
  <blockquote>
    <p>The type 'GridViewColumn' was not found. Verify that you are not
    missing an assembly reference and that all referenced assemblies have
    been built.</p>
  </blockquote>
  
  <p>Looking within my Reference Manager, I have this message under the Assemblies tab :</p>
  
  <blockquote>
    <p>All of the Framework assemblies are already referenced. Please use the
    Object Browser to explore the references in the Framework.</p>
  </blockquote>
  
  <p>When I browse through I cannot find 'PresentationFramework.dll'.
  Here is the MSDN for the class : <a href="http://msdn.microsoft.com/en-us/library/system.windows.controls.gridviewcolumn(v=vs.110).aspx" rel="nofollow noreferrer">http://msdn.microsoft.com/en-us/library/system.windows.controls.gridviewcolumn(v=vs.110).aspx</a></p>
  
  <pre><code>using System;
  using System.Collections.Generic;
  using System.IO;
  using System.Linq;
  using System.Runtime.InteropServices.WindowsRuntime;
  using Windows.Foundation;
  using Windows.Foundation.Collections;
  using Windows.UI.Xaml;
  using Windows.UI.Xaml.Controls;
  using Windows.UI.Xaml.Controls.Primitives;
  using Windows.UI.Xaml.Data;
  using Windows.UI.Xaml.Input;
  using Windows.UI.Xaml.Media;
  using Windows.UI.Xaml.Navigation;
  </code></pre>
  
  <p>I have tried to add <code>using System.Windows.Controls.GridViewColumn</code> but am receiving this error:</p>
  
  <blockquote>
    <p>The type or namespace name <code>Controls</code> does not exist in the namespace
    <code>System.Windows</code> (are you missing an assembly reference?)</p>
  </blockquote>
  
  <p>EDIT:</p>
  
  <p>For WhyCry, when I search as you suggested I still don't get any results.
  <img src="https://i.stack.imgur.com/Xsjdm.png" alt="enter image description here">
  Perhaps I need to use a different GridView? Maybe <code>Windows.UI.Xaml.Controls</code>?</p>