//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 }); } }