private async void CashInButton_Click(object sender, RoutedEventArgs e)
        {
            var cashInWindow = new CashInWindow();

            await DialogHost.Show(cashInWindow, "RootDialog");

            loadTransactionsList();
        }
        private async void ExecuteRunDialog(object o)
        {
            //let's set up a little MVVM, cos that's what the cool kids are doing:
            var view = new CashInWindow();

            //show the dialog
            var result = await DialogHost.Show(view);

            //check the result...
            Console.WriteLine("Dialog was closed, the CommandParameter used to close it was: " + (result ?? "NULL"));
        }