/// <summary>
/// Creates a descending key comparer.
/// </summary>
/// <typeparam name="TKey">The type of key objects being compared.</typeparam>
/// <param name="selector">The key selector. May not be <c>null</c>.</param>
/// <param name="keyComparer">The key comparer. The returned comparer applies this key comparer in reverse. Defaults to <c>null</c>. If this is <c>null</c>, the default comparer is used.</param>
/// <param name="allowNulls">A value indicating whether <c>null</c> values are passed to <paramref name="selector"/>. If <c>false</c>, then <c>null</c> values are considered less than any non-<c>null</c> values and are not passed to <paramref name="selector"/>.</param>
/// <returns>A key comparer.</returns>
public IFullComparer <T> OrderByDescending <TKey>(Func <T, TKey> selector, IComparer <TKey> keyComparer = null, bool allowNulls = false)
{
Contract.Requires(selector != null);
Contract.Ensures(Contract.Result <IFullComparer <T> >() != null);
return(Compare <T> .OrderByDescending(selector, keyComparer, allowNulls));
}
/// <summary>
/// Gets the default comparer for this type.
/// </summary>
public IFullComparer <T> Default()
{
Contract.Ensures(Contract.Result <IFullComparer <T> >() != null);
return(Compare <T> .Default());
}
