Which reference needs to be answered to use TOD_Sky? It's my last error. It doesn't exist in this plugin so must be a reference I need to add into my Visual Studio project.  Thank you for the help. (New to this.)

Simply add all from Managed :think: and it's Assembly-CSharp-firstpass.dll

Thank you misticos.  I will try that. 

Merged post

I hate adding all possible references to a project.  I prefer to just add the ones needed for a given project.   The Assembly-CSharp fixed it.  Thank you!