using Gtk;
using System;
 
class SharpApp : Window
{ Label label;
  public SharpApp() : base("Початкове вікно")
  { SetDefaultSize(300, 120);
    SetPosition(WindowPosition.Center);
    DeleteEvent += delegate { Application.Quit(); };
    label = new Label("Поточний шрифт");
    Button button = new Button("Вибрати шрифт");
    button.Clicked += OnClicked;
    Fixed fix = new Fixed();
    fix.Put(button, 100, 30);
    fix.Put(label, 10, 90);
    Add(fix);
    ShowAll();
  }

  void OnClicked(object sender, EventArgs args)
  { FontSelectionDialog fdia = new FontSelectionDialog("Вибір шрифта");
    fdia.Response += delegate (object o, ResponseArgs resp)
    { if (resp.ResponseId == ResponseType.Ok)
      { Pango.FontDescription fontdesc = 
        Pango.FontDescription.FromString(fdia.FontName);
        label.ModifyFont(fontdesc);
      }
    };
    fdia.Run();
    fdia.Destroy();
  }

  public static void Main()
  { Application.Init();
    new SharpApp();
    Application.Run();
  }
}