vowels

 server ----

    public int vowels(string input)
        {
            int vowelCnt = 0;
            foreach (char c in input.ToLower())
            {
                if(c=='a' || c=='e' || c=='i'|| c=='o' || c == 'u')
                {
                    vowelCnt++;
                }
            }

            return vowelCnt;
        }


client---

        String input = TextBox1.Text;
            ServiceReference1.WebService1SoapClient obj = new ServiceReference1.WebService1SoapClient();
            int res = obj.vowels(input);
            Label2.Text = Convert.ToString(res);