LINQ Concat Query Operator

LINQ Concat Query Operator - concatenates two sequences.

class Pet
            {
                 public string Name { get; set; }
                 public int Age { get; set; }
             }

             static Pet[] GetCats()
            {
                Pet[] cats = { new Pet { Name="Barley", Age=8 },
                               new Pet { Name="Boots", Age=4 },
                               new Pet { Name="Whiskers", Age=1 } };
                 return cats;
            }

            static Pet[] GetDogs()
            {
                Pet[] dogs = { new Pet { Name="Bounder", Age=3 },
                               new Pet { Name="Snoopy", Age=14 },
                               new Pet { Name="Fido", Age=9 } };
                 return dogs;
            }

            public static void ConcatEx1()
            {
                Pet[] cats = GetCats();
                Pet[] dogs = GetDogs();

               IEnumerable<string> query =
                    cats.Select(cat => cat.Name).Concat(dogs.Select(dog => dog.Name));

                 foreach (string name in query)
                {
                   Console.WriteLine(name);
                 }
             }

             // This code produces the following output:
            //
            // Barley
            // Boots
            // Whiskers
            // Bounder
            // Snoopy
            // Fido