Greet

 Server------

public string Greet(string name)
        {
           if (DateTime.UtcNow.AddHours(5.5).Hour<12)
            {
                return "Hello" + name + "Good Morning";

            }
           else if (DateTime.UtcNow.AddHours(5.5).Hour<17)
            {
                return "Hello" + name + "Good Afternoon";
            }
           else
            {
                return "Hello" + name + "Good evening";
            }
        }

client -------


            string name = TextBox1.Text;
            ServiceReference1.WebService1SoapClient obj = new ServiceReference1.WebService1SoapClient();
            string res = obj.Greet(name);

            Label2.Text = res;