If you have issues with your project file or with the project system, you can always ping me or David Kean or other team members on Twitter. However, Twitter is not always the most ideal way to carry on support-type conversations, particularly if there needs to be a lot of back and forth.
As a result, I created a Gitter channel for the dotnet/project-system repo which can be a place to have those more in-depth conversation. I’ll be monitoring the channel and will try and pull in other people as needed if there are questions beyond my expertise. We’ll see if it can develop into a place where people can come to get their C#/VB/F# project questions answered. Hope to see you there!