private void SelectContactButtonClick(object sender, RoutedEventArgs e)
        {
            var selected = ContactsList.SelectedItem as Contact;

            try {
                MessageService.AddRecipient(selected);
                StatusBlock.Alert($"{selected.FirstName} {selected.LastName} was added to the list", StatusBlock.Success);
            }
            catch (EmptyFieldException ex)
            {
                StatusBlock.Alert(ex.Message, StatusBlock.Warning);
            }
            catch (ItemAllreadyExistsException ex)
            {
                StatusBlock.Alert(ex.Message, StatusBlock.Warning);
            }
            catch (ItemNotFoundException ex)
            {
                StatusBlock.Alert(ex.Message, StatusBlock.Warning);
            }
            catch (Exception)
            {
                StatusBlock.Alert("Error while adding recipient", StatusBlock.Danger);
            }
        }