C# '；在模块mscorlib.dll'；中找不到类型System.Resources.ResourceSet；在windows phone 8.1应用程序中

我正在为我的应用程序创建登录页面。我添加了System.Windows.Forms引用并使用了MessageBox.Show。但它给出了一个错误“在模块mscorlib.dll中找不到类型System.Resources.ResourceSet”。

您不能在Windows Phone 8.1项目中使用Windows.Forms命名空间

改用MessageDialog

private void LoginButton_Click(object sender, RoutedEventArgs e)
{
     if(username.Text == "")           
          MessageBox.Show("Enter username");
     else if (password.Password == "")            
          MessageBox.Show("Enter password");
     else if (username.Text == "anve" && password.Password == "123")
     {
          MessageBox.Show("Success !");
          Frame.Navigate(typeof(List));
     }
     else
          MessageBox.Show("Enter Valid Credentials");            
}

或较短版本

private async void ShowMessageDialog()
{
   MessageDialog msgbox = new MessageDialog("Hello!"); 
   await msgbox.ShowAsync();  
}

---

无法在Windows Phone 8.1项目中使用Windows.Forms命名空间

改用MessageDialog

private void LoginButton_Click(object sender, RoutedEventArgs e)
{
     if(username.Text == "")           
          MessageBox.Show("Enter username");
     else if (password.Password == "")            
          MessageBox.Show("Enter password");
     else if (username.Text == "anve" && password.Password == "123")
     {
          MessageBox.Show("Success !");
          Frame.Navigate(typeof(List));
     }
     else
          MessageBox.Show("Enter Valid Credentials");            
}

或较短版本

private async void ShowMessageDialog()
{
   MessageDialog msgbox = new MessageDialog("Hello!"); 
   await msgbox.ShowAsync();  
}

---

无法在Windows Phone 8.1项目中使用Windows.Forms命名空间

改用MessageDialog

private void LoginButton_Click(object sender, RoutedEventArgs e)
{
     if(username.Text == "")           
          MessageBox.Show("Enter username");
     else if (password.Password == "")            
          MessageBox.Show("Enter password");
     else if (username.Text == "anve" && password.Password == "123")
     {
          MessageBox.Show("Success !");
          Frame.Navigate(typeof(List));
     }
     else
          MessageBox.Show("Enter Valid Credentials");            
}

或较短版本

private async void ShowMessageDialog()
{
   MessageDialog msgbox = new MessageDialog("Hello!"); 
   await msgbox.ShowAsync();  
}

---

无法在Windows Phone 8.1项目中使用Windows.Forms命名空间

改用MessageDialog

private void LoginButton_Click(object sender, RoutedEventArgs e)
{
     if(username.Text == "")           
          MessageBox.Show("Enter username");
     else if (password.Password == "")            
          MessageBox.Show("Enter password");
     else if (username.Text == "anve" && password.Password == "123")
     {
          MessageBox.Show("Success !");
          Frame.Navigate(typeof(List));
     }
     else
          MessageBox.Show("Enter Valid Credentials");            
}

或较短版本

private async void ShowMessageDialog()
{
   MessageDialog msgbox = new MessageDialog("Hello!"); 
   await msgbox.ShowAsync();  
}