private void Key_PropertyChanged(object sender, PropertyChangedEventArgs e)
        {
            form.RefreshVirtualProperties();

            switch (e.PropertyName)
            {
            case "Name":
                form.KeyName = Key.Name;
                break;

            case "Keytype":
                form.Keytype = Key.Keytype;
                break;

            case "Description":
                form.Description = Key.Description;
                break;

            case "Columns":
                form.Columns = Key.Columns;
                break;
            }
        }