public void MenuItemCallback() { // Create the package IVsPackage package = new IteonCreateRealFolderVsPackagePackage() as IVsPackage; Assert.IsNotNull(package, "The object does not implement IVsPackage"); // Create a basic service provider OleServiceProvider serviceProvider = OleServiceProvider.CreateOleServiceProviderWithBasicServices(); // Create a UIShell service mock and proffer the service so that it can called from the MenuItemCallback method BaseMock uishellMock = UIShellServiceMock.GetUiShellInstance(); serviceProvider.AddService(typeof(SVsUIShell), uishellMock, true); // Site the package Assert.AreEqual(0, package.SetSite(serviceProvider), "SetSite did not return S_OK"); //Invoke private method on package class and observe that the method does not throw System.Reflection.MethodInfo info = package.GetType().GetMethod("MenuItemCallback", BindingFlags.Instance | BindingFlags.NonPublic); Assert.IsNotNull(info, "Failed to get the private method MenuItemCallback throug refplection"); info.Invoke(package, new object[] { null, null }); //Clean up services serviceProvider.RemoveService(typeof(SVsUIShell)); }