title: How to add a Reference to the Windows.ApplicationModel.DataTransfer namespace in Visual Studio 2019 on Windows 10 PRO
body: <p>Windows 10 Pro, Visual Studio 2019, .Net version 4.8.03752 (Clean installation of everything a few days ago).</p>
  
  <p>I'm trying to add the Windows.ApplicationModel.DataTransfer namespace to my C# project in Visual Studio 2019 (free edition).  I cannot find anything to add under References->Add References->Assemblies. </p>
  
  <p>The documentation for ClipboardContentOptions states that the dll is Windows.ApplicationModel.DataTransfer.dll so I search for the dll and find versions in</p>
  
  <p>C:\Windows\System32 (799Kb)
  C:\Windows\SysWOW64 (566Kb), </p>
  
  <p>I attempt to add these dlls via References->AddReference->Browse and in both cases get the error </p>
  
  <p><code>A Reference to &lt;path to dll&gt; could not be added.  Please make sure that the file is accessible and that it is a valid assembly or COM component</code></p>
  
  <p>What's going on here and how do I add a Reference to this namespace?</p>
  
  <p>Thanks in advance.</p>