When I tried to follow this tutorial: https://docs.microsoft.com/en-us/aspnet/core/tutorials/first-mvc-app/adding-model At the part where I try to add the controller I get the following error (see screenshot).  Note that I can build the project successfully. But cannot add the controller. Not sure if this is a user error, but if not it's a bad bug. Microsoft Visual Studio Enterprise 2017 RC Visual Studio/15.0.0-RC4+26129.0.d15rel @danroth27 @mlorbetske