ReportExecutionService can not be found

Hi, I am trying to generate report through a console application, I am following this article: https://msdn.microsoft.com/en-us/library/microsoft.wssux.reportingserviceswebservice.rsexecutionservice2005.reportexecutionservice.render.aspx.  

I added web reference to my project, but I can not find reportexecution service, all I can see is reportservice2005, did I miss something ?

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using ReportGenerator.SsrsReportService;

namespace ReportGenerator
{
    class Program
    {
        static void Main(string[] args)
        {
            ReportingService2005 rs = new ReportingService2005();
            ReportExecutionService re = new ReportExecutionService();
        }
    }
}