I have an assembly X that is referencing System.Interactive and System.Reactive from a lib folder.
Then I have assembly Y that is referencing X.
In X for both, System.Interactive and System.Reactive, 'Copy Local' is set to true.
In Y for X 'Copy Local' is set to true.
System.Reactive and System.Interactive are not in the GAC.
When I build Y, System.Interactive and System.Reactive are not copied to the output directory. Why?