public static IList <ToDoItem> CreateItems( int count, string idPrefix, string containerRid = null) { List <ToDoItem> items = new List <ToDoItem>(); for (uint i = 0; i < count; i++) { ResourceId rid = null; if (containerRid != null) { // id 0 returns null for resource id rid = ResourceId.NewDocumentId(containerRid, i + 1); } items.Add(ToDoItem.Create(idPrefix, rid)); } return(items); }