if a class method isn't virtual/abstract, or the class is sealed, then Fakes won't wire up the Stub to call the StubObserver. Try to detect this case and provide the user with an exception message that helps them know about the issue (ie: "Method must be virtual" instead of just a failure).
if a class method isn't virtual/abstract, or the class is sealed, then Fakes won't wire up the Stub to call the StubObserver. Try to detect this case and provide the user with an exception message that helps them know about the issue (ie: "Method must be virtual" instead of just a failure).