public void SaveExecute()
 {
     if (String.IsNullOrEmpty(Clinic.Owner) || String.IsNullOrEmpty(Clinic.NumberOfAccessPointsForAmbulanceCars.ToString()) ||
         String.IsNullOrEmpty(Clinic.NumberOfAccessPointsForInvalids.ToString()))
     {
         MessageBox.Show("Please fill all fields.", "Notification");
     }
     else
     {
         try
         {
             MessageBoxResult result = MessageBox.Show("Are you sure you want to save changes?", "Confirmation", MessageBoxButton.YesNo, MessageBoxImage.Question);
             if (result == MessageBoxResult.Yes)
             {
                 bool isEdited = clinics.EditClinic(Clinic);
                 if (isEdited == true)
                 {
                     MessageBox.Show("Clinic is edited.", "Notification", MessageBoxButton.OK);
                 }
                 else
                 {
                     MessageBox.Show("Clinic cannot be edited.", "Notification", MessageBoxButton.OK);
                 }
             }
         }
         catch (Exception ex)
         {
             MessageBox.Show(ex.ToString());
         }
     }
 }