WCF Throttling

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.Text;
using System.Threading;

namespace WCFThrottling
{
    public class Service1 : IService1
    {
        Guid sessionGuid = Guid.NewGuid();

        public Guid Ping()
        {
            Thread.Sleep(1*1000);
            return sessionGuid;
        }
    }
}