private void Window_Closing(object sender, System.ComponentModel.CancelEventArgs e)
 {
     this._Main.UpdateStatusBar("Zavírám profil uživatele...", 0);
     UserInfoWindow.instance = null;
 }
 public static UserInfoWindow ReturnInstance(MainGUI main, User u)
 {
     if (UserInfoWindow.instance == null)
         UserInfoWindow.instance = new UserInfoWindow(main, u);
     return UserInfoWindow.instance;
 }