C# (CSharp) System.Linq Queryable.Contains примеры использования

Пример #1

 public virtual Boolean Contains <TSource>(IQueryable <TSource> source, TSource item, IEqualityComparer <TSource> comparer)
 {
     return(Queryable.Contains <TSource>(source, item, comparer));
 }

Пример #2

 public virtual Boolean Contains <TSource>(IQueryable <TSource> source, TSource item)
 {
     return(Queryable.Contains <TSource>(source, item));
 }