private void Update_Click(object sender, RoutedEventArgs e)
        {
            Window w2 = new Worker_Register(service, VM.SelectedWorker.worker_id, VM.SelectedWorker.worker_name, VM.SelectedWorker.worker_pass);

            w2.Show();
            this.Close();
        }
        private void Add_Click(object sender, RoutedEventArgs e)
        {
            Window w2 = new Worker_Register(service);

            w2.Show();
            this.Close();
        }