Development ASP.Net Tutorial

File: Default.asmx
<%@ WebService Language="C#" CodeBehind="~/App_Code/Default.cs" Class="Performance.Default" %>
File: ~/App_Code/Default.cs
using System;
using System.Web;
using System.Web.Services;
using System.Web.Services.Protocols;
namespace Performance
{
    [WebService(Namespace = "http://tempuri.com/")]
    [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
    public class Default : WebService
    {
        private static Random _rand = new Random();
        [WebMethod]
        public bool IsValid() 
        {
            switch (_rand.Next(4))
            {
                case 0:
                case 1:
                case 2:
                    return true;
                default:
                    return false;
            }
        }
        
    }
}