public void WillDiplayDocumentationMessageIfCalledTooMuch() { demo.VoidNoArgs(); LastCall.Message("Should be called only once"); mocks.ReplayAll(); demo.VoidNoArgs(); ; Assert.Throws <ExpectationViolationException>( @"IDemo.VoidNoArgs(); Expected #1, Actual #2. Message: Should be called only once", () => demo.VoidNoArgs()); }