string s = "MD5"; 
            MD5 md5 = new MD5CryptoServiceProvider(); 
            md5.ComputeHash(System.Text.Encoding.UTF8.GetBytes(s)); 
            Byte[] encodedBytes =md5.Hash; 
            string Hash =BitConverter.ToString(encodedBytes); 
            string[] ArrayHash = Hash.Split('-'); 
            StringBuilder EncodedHash = new StringBuilder(); 

            for (int i = 0; i < ArrayHash.Length; i++) 
            { 
                EncodedHash.Append(ArrayHash[i]); 
            } 
            Console.WriteLine(EncodedHash); 
            Console.Read();