title: Dependent DLL is not getting copied to the build output folder in Visual Studio
body: <p>I have a visual studio solution.
  I have many projects in the solution.
  There is one main project which acts as the start up and uses other projects.
  There is one project say "ProjectX". Its reference is added to main project.
  The ProjectX references another .NET dll (say abc.dll) that isn't part of the solution. </p>
  
  <p>Now this abc.dll should be copied to bin/debug folder of main project, but it isn't getting copied there. Why is it not getting copied, any known reasons ?</p>