Question

I’m trying to create a delegate event that is accessible in another form. But the main form doesn’t seen to be able to see my delegate. It say delegate name is not valid at this point.
modal form

public partial class GameOverDialog : Window
{
   public delegate void ExitChosenEvent();
   public delegate void RestartChosenEvent();

   public GameOverDialog()
   {
      InitializeComponent();
   }

   private void closeAppButton_Click(object sender, RoutedEventArgs e)
   {
      ExitChosenEvent exitChosen = Close;
      exitChosen();
      Close();
   }

   private void newGameButton_Click(object sender, RoutedEventArgs e)
   {
      RestartChosenEvent restart = Close;
      restart();
      Close();
   }
}

Main form:

private void ShowGameOver(string text)
{
   var dialog = new GameOverDialog { tb1 = { Text = text } };
   dialog.RestartChosenEvent += StartNewGame();
   dialog.Show();
}

private void StartNewGame()
{
   InitializeComponent();
   InitializeGame();
}

After @Fuex’s Help*

private void ShowGameOver(string text)
{
   var dialog = new GameOverDialog { tb1 = { Text = text } };
   dialog.RestartEvent += StartNewGame;
   dialog.ExitEvent += Close;
   dialog.Show();
}

Answer 1

It doesn’t work because delegate void RestartChosenEvent() declares the type of the reference which allows to encapsulate the method. So by using on it += StartNewGame gives an error. The right code is:

public partial class GameOverDialog : Window
{
    delegate void myDelegate();

    public myDelegate RestartChosenEvent;
    public myDelegate ExitChosenEvent;

    public GameOverDialog()
    {
        InitializeComponent();
    }

    private void closeAppButton_Click(object sender, RoutedEventArgs e)
    {
        ExitChosenEvent();
        this.Close();
    }

    private void newGameButton_Click(object sender, RoutedEventArgs e)
    {
        RestartChosenEvent();
        this.Close();
    }
}

Then in your main form you have to use StartNewGame, which is the pointer of the method to pass, rather than StartNewGame():

private void ShowGameOver(string text)
{
   var dialog = new GameOverDialog { tb1 = { Text = text } };
   dialog.RestartChosenEvent += StartNewGame;
   dialog.Show();
}