public MainWindow()
 {
     InitializeComponent();
     typeOfRepetitions = TypeOfRepetitions.None;
     frame.Content     = new BasePage();
 }
        private void OnceAMounthMenuItemClick(object sender, RoutedEventArgs e)
        {
            typeOfRepetitions = TypeOfRepetitions.OnceAMounth;

            periodicityMenuItem.Header = "Once a mounth";
        }
        private void OnceAYearMenuItemClick(object sender, RoutedEventArgs e)
        {
            typeOfRepetitions = TypeOfRepetitions.OnceAYear;

            periodicityMenuItem.Header = "Once a year";
        }
        private void OneTimeMenuItemClick(object sender, RoutedEventArgs e)
        {
            typeOfRepetitions = TypeOfRepetitions.OneTime;

            periodicityMenuItem.Header = "One time";
        }