private void AddNewItem()
        {
            CustomerIdentity         newIdentity = new CustomerIdentity();
            EditCustomerIdentityForm form        = new EditCustomerIdentityForm(newIdentity);

            if (form.ShowDialog() == DialogResult.OK)
            {
                AddSenderIdentity(newIdentity);
            }
        }
        private void EditSelectedItem()
        {
            ListView.SelectedListViewItemCollection items = SenderIdentityListView.SelectedItems;
            if (items.Count > 1)
            {
                MessageBox.Show("You can only edit one item at the same time.");
                return;
            }

            ObjectListViewItem lvi = items[0] as ObjectListViewItem;
            CustomerIdentity   underlyingObject = lvi?.UnderlyingObject as CustomerIdentity;

            if (underlyingObject != null)
            {
                CustomerIdentity         copy = underlyingObject.Copy();
                EditCustomerIdentityForm form = new EditCustomerIdentityForm(copy);
                if (form.ShowDialog() == DialogResult.OK)
                {
                    copy.CopyTo(underlyingObject);
                    lvi.SubItems[0].Text = CustomerIdentity.IdentityTypeToElbaString(underlyingObject.IdentityType);
                    lvi.SubItems[1].Text = underlyingObject.Value;
                }
            }
        }