title: XUnit.net test cases not displaying in test explorer in visual studio 2013
body: <p>I am beginner for xunit testing. 
  My colleague has installed xunit from nuget packages of visual studio 2013 update 3. Then he did the unit testing and checked in everything in SVN.
  When I took the updated code from SVN, it shows me everything fine.
  But, when I am running the individual test case, test case is not running.
  Also, Test explorer is not showing any test from test project.
  Please let me know the solution.
  Thanks. </p>