private void OnGoNextWithArgs()
        {
            var navArgs = new SecondViewModelNavigationArguments()
            {
                Message = "The number was: ",
                Number  = ViewModel.NumberState,
            };

            ShowViewModel <SecondViewModel>(navArgs);
        }
 public void Init(SecondViewModelNavigationArguments navArgs)
 {
     ViewModel.Hello = string.Format("{0} : {1}", navArgs.Message, navArgs.Number);
 }