//Fill 'Categories' list-box.
void FillCategories()
{
List <int> lst = new List <int>(_proxy.GetItemsAsync(EngServRef.ServerData.VideoCategory).Result);
foreach (int item in lst)
{
lstCategory.Items.Add(new CheckBox {
VerticalAlignment = VerticalAlignment.Stretch, Tag = item, Content = _proxy.GetItemPropertyAsync(item, EngServRef.ServerData.VideoCategory, EngServRef.PropertyData.Name).Result, Style = TryFindResource("chNormal") as Style, HorizontalAlignment = HorizontalAlignment.Left
});
}
}