title: Visual Studio won't find class in separate .cs file
body: <p>I have two classes in separate files in a project I'm working on. Windows forms classes specifically. When I try to use one class from the .cs file, Visual Studio cannot find it. It underlines the line of code and asks if I'm missing a directive or assembly reference. I have no idea why it isn't seeing the other class, as both .cs files are in the same directory. Does anyone have any ideas as to why this would be happening and how to fix it?</p>
  
  <p>Also, one of the .cs files is copied from a separate project, so I don't know if that caused a problem somehow.</p>