Support Single-Project Build Operations

User suggestion from [474701](https://devdiv.visualstudio.com/DevDiv/_workitems/edit/474701) | [DevCom](https://developercommunity.visualstudio.com/content/problem/89481/c-project-no-projects-specic-menu.html)

C# project system does not support single-project build operations. (The C++ project system supports this action) It can be very helpful to rebuild a single project without needing to first rebuild all of its dependencies. In this case, when building a project, user cannot view project properties on a different project