/// <summary>
 /// Редактирует абонента.
 /// </summary>
 /// <param name="id">ID абонента</param>
 public void EditSubscriber(long id)
 {
     EditSubscriberController controller = new EditSubscriberController(id);
     FormSubscriber form = new FormSubscriber(controller);
     if (form.ShowDialog() == DialogResult.OK)
     {
     }
     else
     {
         controller.Cancel();
     }
 }
        /// <summary>
        /// Добавляет абонента.
        /// </summary>
        public void AddSubscriber()
        {
            AddSubscriberController controller = new AddSubscriberController();
            FormSubscriber form = new FormSubscriber(controller);
            if (form.ShowDialog() == DialogResult.OK)
            {

            }
            else
            {
                controller.Cancel();
            }
        }