WP7 Isolated Storage : Can't Create Directory

Question

When i 'm executing his code, it works fine but i didn't get the specified directory in my solution explorer.
Or there is any logical error !!


IsolatedStorageFile fileStorage = IsolatedStorageFile.GetUserStoreForApplication();

 private void button1_Click(object sender, RoutedEventArgs e)
        {
            fileStorage.CreateDirectory("Test");

        }

Note : I 'm working on emulator,
since there is no External Storage apart from HDD.