public static IOrderedEnumerable <TSource> ThenByDescending <TSource, TKey>(this IOrderedEnumerable <TSource> source, Func <TSource, TKey> keySelector, IComparer <TKey> comparer)
{
LinqCheck.SourceAndKeySelector(source, keySelector);
var oe = source as OrderedEnumerable <TSource>;
if (oe != null)
{
return(oe.CreateOrderedEnumerable(keySelector, comparer, true));
}
return(source.CreateOrderedEnumerable(keySelector, comparer, true));
}
public static IOrderedEnumerable <TSource> OrderByDescending <TSource, TKey>(this IEnumerable <TSource> source, Func <TSource, TKey> keySelector, IComparer <TKey> comparer)
{
LinqCheck.SourceAndKeySelector(source, keySelector);
return(new OrderedSequence <TSource, TKey>(source, keySelector, comparer, SortDirection.Descending));
}