private void AssignClientsToDeliverers_Click(object sender, RoutedEventArgs e)
        {
            //Get selected Deliverer from DataGrid
            Deliverer selectedDeliverer = DeliverersDataGrid.SelectedItem as Deliverer;

            if (selectedDeliverer != null)
            {
                //MessageBox.Show("Assigning Clients to " + selectedDeliverer.LastName + ", " + selectedDeliverer.FirstName + "!");

                WindowAssignClientsToDeliverer delivererAssignment = new WindowAssignClientsToDeliverer(selectedDeliverer);
                delivererAssignment.ShowDialog();
            }
            else
            {
                MessageBox.Show("Select a deliverer row in the data grid above fool!");
            }
        }
        private void AssignClientsToDeliverers_Click(object sender, RoutedEventArgs e)
        {
            //Get selected Deliverer from DataGrid
            Deliverer selectedDeliverer = DeliverersDataGrid.SelectedItem as Deliverer;

           if (selectedDeliverer != null)
           {
               //MessageBox.Show("Assigning Clients to " + selectedDeliverer.LastName + ", " + selectedDeliverer.FirstName + "!");

               WindowAssignClientsToDeliverer delivererAssignment = new WindowAssignClientsToDeliverer(selectedDeliverer);
               delivererAssignment.ShowDialog();
           }
           else
           {
               MessageBox.Show("Select a deliverer row in the data grid above fool!");
           }
        }