public IEnumerable <TSource> DistinctTest <TSource, TKey>(IEnumerable <TSource> source, Func <TSource, TKey> keySelector)
{
IEnumerable <TSource> result = EnumerableExtension.Distinct <TSource, TKey>(source, keySelector);
return(result);
// TODO: add assertions to method EnumerableExtensionTest.DistinctTest(IEnumerable`1<!!0>, Func`2<!!0,!!1>)
}