private void ButtonBase_OnClick(object sender, RoutedEventArgs e)
 {
     var client = new MailServiceClient();
     var config = new Config()
     {
         Key = (DataContext as TestViewModel).Key, Value = (DataContext as TestViewModel).Value
     };
     var resultConfig = client.CreateConfigAsync(new User()
     {
         Id = 1
     }, config);
 }