public JoinOrderViewModel(JoinOrderWindow parent)
{
parentWindow = parent;
Model_Instance = new JoinOrderModel(this);
joinOrderCommand = new RelayCommand(joinOrder, (x) => true);
}
private void ButtonJoinOrder_Click(object sender, RoutedEventArgs e)
{
this.Hide();
var JoinOrderWindow_instance = new JoinOrderWindow(this);
JoinOrderWindow_instance.Show();
}