We are don't using mscorlib in our project, but have own assemblies that
cover some standard namespaces such as System, System.Diagnostics... and
we have own implementation many types from mentioned namespaces. In this
case ReSharper has some strange warnings, for example: ambiguity warning
(System.Debug and System.Debug). It seems R# does not recognize that mscorlib
was cut off.
Best regards, Segey Pomadin.