public bool tryFind(int id, out BookInformation res) { if (Data.Count == 0) { res = null; return(false); } var result = from book in Data where book.BookID == id select book; if (result.Count() == 0) { res = null; return(false); } res = result.First(); return(true); }
public void ReplaceTo(int id, BookInformation item) { var result = from book in Data where book.BookID == id select book = item.Clone(); }
public void Add(BookInformation item) { Data.Add(item); }