Enumerable.Aggregate(Of TSource) Method (IEnumerable(Of TSource), Func(Of TSource, TSource, TSource))

string sentence = "the quick brown fox jumps over the lazy dog";

            // Split the string into individual words.
            string[] words = sentence.Split(' ');

            // Prepend each word to the beginning of the 
            // new sentence to reverse the word order.
            string reversed = words.Aggregate((workingSentence, next) =>
                                                  next + " " + workingSentence);

            Console.WriteLine(reversed);

            // This code produces the following output:
            //
            // dog lazy the over jumps fox brown quick the