private void AddBookingView_Loaded(object sender, RoutedEventArgs e)
{
BookingViewModel bookingViewModel = (DataContext as BookingViewModel);
if (bookingViewModel.AddBookingView == null)
{
var addBookingView = (AddBookingView)sender;
addBookingView.BookingView = this;
bookingViewModel.AddBookingView = addBookingView;
bookingViewModel.SetupAddBookingView();
}
}