title: VisualStudio doesn't recognize a new reference that I add
body: <p>I have written a DLL and then in my solution I am adding a reference to it, but when I declare it in the usings section, it gives me error that this is not recognized, are you missing a reference?</p>
  
  <p>here is how I set up my solution... </p>
  
  <p>1- First I had created my DLL. Let's name it MyDLLLibrary, sitting somewhere on hard drive. </p>
  
  <p>2- I also had a solution, consisting of several other projects...for all of these I have created a folder like "C:\_debug" and I have set "Output Path" and "Reference Path" of all these projects to point to that common folder. So far, s good.</p>
  
  <p>3- Now I add that MyDLLLibrary to this solution, change its "Output" and Reference Path to point to the same common debug folder, use Add Refrence and at the reference to MyDLLLibrary to the project I want in the solution and rebuild the solution... </p>
  
  <p>Now if I use a using statement, still it doesn't recognize it. </p>
  
  <p>I even tried the add refrence from projects tab..that didn't work either. </p>