private async void Modifier_OnClick(object sender, RoutedEventArgs e)
        {
            if (_CLIENT_LIST?.SelectedItem == null)
                return;

            _BUSY_INDICATOR.IsBusy = false;
            var wind = new NewClient((Guid)_CLIENT_LIST.SelectedValue) { Owner = Window.GetWindow(this) };
            wind.ShowDialog();
            await Refresh();
        }
        private async void AddButon_Click(object sender, RoutedEventArgs e)
        {
            var wind = new NewClient(Guid.Empty)
            {
                Owner = Window.GetWindow(this)
            };

            wind.ShowDialog();
            await Refresh();
        }
        private async void Modifier_OnClick(object sender, RoutedEventArgs e)
        {
            if (_CLIENT_LIST?.SelectedItem == null)
            {
                return;
            }

            _BUSY_INDICATOR.IsBusy = false;
            var wind = new NewClient((Guid)_CLIENT_LIST.SelectedValue)
            {
                Owner = Window.GetWindow(this)
            };

            wind.ShowDialog();
            await Refresh();
        }
 private async void AddButon_Click(object sender, RoutedEventArgs e)
 {
     var wind = new NewClient(Guid.Empty) { Owner = Window.GetWindow(this) };
     wind.ShowDialog();
     await Refresh();
 }