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);
}