private async void ListView_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
if (e.AddedItems.Count == 0)
{
return;
}
var listItem = (ListViewItem)e.AddedItems[0];
var packageType = listItem.Tag.ToString();
var registry = PackageRegistry.GetInstance(packageType);
var client = new Client();
var result = await client.GetIndexAsync(packageType);
registry.Clear();
registry.AddMany(result.Collection);
addinsGrid.ItemsSource = PackageRegistry.GetInstance(packageType).All();
}