private ObservableCollection <DBStoredImage> BuildDBStoredImageDropDown() { List <DBStoredImage> list = new List <DBStoredImage>(); list = _serviceAgent.GetDBStoredImagesReadOnly(ClientSessionSingleton.Instance.CompanyID).ToList(); list.Add(new DBStoredImage()); list.Sort((x, y) => string.Compare(x.ImageID, y.ImageID)); return(new ObservableCollection <DBStoredImage>(list)); }