title: Visual Studio Online cannot build project due to Entity Framework reference cannot be resolved
body: <p>What can I do to fix this build? Entity Framework was added to this project via NuGet.</p>
  
  <p>All projects compile without issues on local system. But the build fails on Visual Studio Online.</p>
  
  <p>By turning on Diagnostic logging, I am able to trace to this warning which makes my builds failed:</p>
  
  <pre><code>C:\Windows\Microsoft.NET\Framework64\v4.0.30319\Microsoft.Common.targets(1605,5): warning MSB3245: Could not resolve this reference. Could not locate the assembly "EntityFramework.SqlServer". Check to make sure the assembly exists on disk. If this reference is required by your code, you may get compilation errors.
  </code></pre>