public static void ConfirmRequest(Consultation request)
 {
     if (request != null)
     {
         Console.WriteLine("Write duration of consulteation(by minutes).");
         bool t        = false;
         int  duration = 0;
         while (!t)
         {
             try
             {
                 duration = Convert.ToInt32(Console.ReadLine());
                 t        = true;
             }
             catch (FormatException)
             {
                 MessageBox.Show("Write duration of consulteation by minutes.");
             }
         }
         Consultation newConsultation = new Consultation(request.StartOfConsultation, request.StartOfConsultation.AddMinutes(duration), request.Patient);
         Doctor       myDoctor        = (Doctor)myUser;
         myDoctor.ServeAPatient(newConsultation);
         myDoctor.ListOfRequests.Remove(request);
     }
 }