Finding if an alphabet is Vowel or Not using Switch Case

Finding is an alphabet is Vowel or not using Switch...Case..

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

namespace VowelMatch

{

    class Program

    {

        static void Main(string[] args)

        {  

            Console.WriteLine("Enter a single alphabet : ");

            //Convert the alphabet to lowercase so that the Switch Case works even when uppercase

            //or lowercase alphabets are given          

            char alphabet = Convert.ToChar(Console.ReadLine().ToLowerInvariant());

            string finalmessage;

            switch (alphabet)

            {

                case 'a' :

                    finalmessage = "an Vowel";

                    break;

                case 'e':

                    finalmessage = "an Vowel";

                    break;

                case 'i':

                    finalmessage = "an Vowel";

                    break;

                case 'o':

                    finalmessage = "an Vowel";

                    break;

                case 'u':

                    finalmessage = "an Vowel";

                    break;

                default :

                    finalmessage = "not a Vowel";

                    break;                   

            }

            Console.WriteLine("Alphabet {0} is {1}",alphabet,finalmessage);

            Console.ReadLine();

        }

    }

}

Output: