Hey guys, I'm having this problem, this is my first example add-on. I am experiencing the same problem in Visual Studio 2017 and 2010. I tried different versions and references, but not solved... Waiting for your help!
Error 1 The type 'UnityEngine.MonoBehaviour' is defined in an assembly that is not referenced. You must add a reference to assembly 'UnityEngine.CoreModule, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null'. c:\users\kckndr\documents\visual studio 2010\Projects\SomeSimpleName\SomeSimpleName\SomeSimpleName.cs 11 18 SomeSimpleName