title: "Microsoft.CSharp.targets" file is missing
body: <p>My C:\WINDOWS\Microsoft.NET\Framework\v3.5\Microsoft.CSharp.targets file is missing from my computer. I closed my IDE, went on lunch, and then when I opened my IDE again, no C# projects would load.</p>
  
  <p>I can see:</p>
  
  <ul>
  <li>C:\WINDOWS\Microsoft.NET\Framework\v3.5\Microsoft.Data.Entity.targets</li>
  <li>C:\WINDOWS\Microsoft.NET\Framework\v3.5\Microsoft.VisualBasic.targets</li>
  <li>C:\WINDOWS\Microsoft.NET\Framework\v3.5\Microsoft.VisualC.STLCLR.dll</li>
  </ul>
  
  <p>and several others, but no Microsoft.CSharp.targets.</p>
  
  <p>What happened and how do I fix it?</p>
  
  <p><a href="https://stackoverflow.com/questions/5694/the-imported-project-c-microsoft-csharp-targets-was-not-found">This</a> isn't helping me.</p>