title: How can I move common code into external assembly to be used in Unity 3d projects?
body: <p>I have to share some code between multiple projects in Unity. This code is under constant changes during work on projects. So I need my code to be shared as separate assembly and be included in each Unity solution in Visual Studio 2015.</p>
  <p>What is the way to make changes in common assembly so that it automatically updates for other projects and for Unity editor?</p>