/// <summary>
/// Documentation
/// </summary>
/// <typeparam name="TSource"></typeparam>
/// <typeparam name="TKey"></typeparam>
/// <param name="source"></param>
/// <param name="keySelector"></param>
/// <param name="sortType"></param>
/// <param name="comparer"></param>
/// <returns></returns>
public static IComposableSortEnumerable <TSource> ThenBy <TSource, TKey>(this IComposableSortEnumerable <TSource> source, Func <TSource, TKey> keySelector, SortType sortType, IComparer <TKey> comparer)
{
if (source == null)
{
throw Error.ArgumentNull("source");
}
source.AppendSorter(keySelector, sortType, comparer, false);
return(source);
}
/// <summary>
/// Documentation
/// </summary>
/// <typeparam name="TSource"></typeparam>
/// <typeparam name="TKey"></typeparam>
/// <param name="source"></param>
/// <param name="keySelector"></param>
/// <param name="sortType"></param>
/// <returns></returns>
public static IComposableSortEnumerable <TSource> ThenByDescending <TSource, TKey>(this IComposableSortEnumerable <TSource> source, Func <TSource, TKey> keySelector, SortType sortType)
{
if (source == null)
{
throw Error.ArgumentNull("source");
}
source.AppendSorter(keySelector, sortType, null, true);
return(source);
}
