动态调用webservice，怎么接受out返回值

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using ShangWu168.Tools;
using ShangWu168.Service.Dynamic;
using System.Data;
using System.Diagnostics;
using System.Runtime.Serialization.Formatters.Binary;
using System.IO;
namespace ShangWu168.Web
{
    public partial class test : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            this.InitialList();
        }
         private void InitialList()
        {         
            int intCurrentPage = RequestClass.GetQueryInt("page", 1);//当前页
            int PageSize = RequestClass.GetQueryInt("PageSize", 15);//每页条数
            string PageCount = "0";//这个地方想接收webservice返回的out值
            string RowsCount = "0";//这个地方想接收webservice返回的out
            string strUrl = "http://127.0.0.1:78/Pagination.asmx";
            string[] args = new string[10];
            args[0] = "web_member";
            args[1] = "member_id";
            args[2] = "*";
            args[3] = "desc";
            args[4] = "member_id";
            args[5] = intCurrentPage.ToString();
            args[6] = PageSize.ToString();
            args[7] = "member_id>1";
            args[8] = PageCount;
            args[9] = RowsCount;
            Stopwatch sw = new Stopwatch();
            sw.Start();
            byte[] zipBuffer = (byte[])WebServiceDynamicInvoke.InvokeWebService(strUrl, "Pagination", "GetDataSetSurrogateZipBytes", args); ;
            byte[] buffer = UnZip.Decompress(zipBuffer);
            BinaryFormatter bf = new BinaryFormatter();
            DataSetSurrogate dss = bf.Deserialize(new MemoryStream(buffer)) as DataSetSurrogate;
            DataSet ds = dss.ConvertToDataSet();
            GridView1.DataSource = ds.Tables[0].DefaultView;
            GridView1.DataBind();
            sw.Stop();
        }
    }
}

using System;
using System.Collections.Generic;
using System.Text;
using System.Net;
using System.IO;
using Microsoft.CSharp;
using System.CodeDom.Compiler;
using System.CodeDom;
using System.Web.Services.Description;

namespace ShangWu168.Service.Dynamic
{
    public class WebServiceDynamicInvoke
    {
        /// <summary>
        /// 动态调用WebService
        /// </summary>
        /// <param name="url">WebService地址</param>
        /// <param name="methodname">方法名(模块名)</param>
        /// <param name="args">参数列表</param>
        /// <returns>object</returns>
        public static object InvokeWebService(string url, string methodname, object[] args)
        {
            return InvokeWebService(url, null, methodname, args);
        }
        /// <summary>
        /// 动态调用WebService
        /// </summary>
        /// <param name="url">WebService地址</param>
        /// <param name="classname">类名</param>
        /// <param name="methodname">方法名(模块名)</param>
        /// <param name="args">参数列表</param>
        /// <returns>object</returns>
        public static object InvokeWebService(string url, string classname, string methodname, object[] args)
        {
            string @namespace = "ServiceBase.WebService.DynamicWebLoad";
            if (classname == null || classname == "")
            {
                classname = WebServiceDynamicInvoke.GetClassName(url);
            }
            //获取服务描述语言(WSDL)
            WebClient wc = new WebClient();
            Stream stream = wc.OpenRead(url + "?WSDL");
            ServiceDescription sd = ServiceDescription.Read(stream);
            ServiceDescriptionImporter sdi = new ServiceDescriptionImporter();
            sdi.AddServiceDescription(sd, "", "");
            CodeNamespace cn = new CodeNamespace(@namespace);
            //生成客户端代理类代码
            CodeCompileUnit ccu = new CodeCompileUnit();
            ccu.Namespaces.Add(cn);
            sdi.Import(cn, ccu);
            CSharpCodeProvider csc = new CSharpCodeProvider();
            ICodeCompiler icc = csc.CreateCompiler();
            //设定编译器的参数
            CompilerParameters cplist = new CompilerParameters();
            cplist.GenerateExecutable = false;
            cplist.GenerateInMemory = true;
            cplist.ReferencedAssemblies.Add("System.dll");
            cplist.ReferencedAssemblies.Add("System.XML.dll");
            cplist.ReferencedAssemblies.Add("System.Web.Services.dll");
            cplist.ReferencedAssemblies.Add("System.Data.dll");
            //编译代理类
            CompilerResults cr = icc.CompileAssemblyFromDom(cplist, ccu);
            if (true == cr.Errors.HasErrors)
            {
                System.Text.StringBuilder sb = new StringBuilder();
                foreach (CompilerError ce in cr.Errors)
                {
                    sb.Append(ce.ToString());
                    sb.Append(System.Environment.NewLine);
                }
                throw new Exception(sb.ToString());
            }

            //生成代理实例,并调用方法
            System.Reflection.Assembly assembly = cr.CompiledAssembly;
            Type t = assembly.GetType(@namespace + "." + classname, true, true);
            object obj = Activator.CreateInstance(t);
            System.Reflection.MethodInfo mi = t.GetMethod(methodname);
            return mi.Invoke(obj, args);//这里不知道如何接受webservice的out值
        }

        /// <summary>
        /// 解析url获取类名
        /// </summary>
        /// <param name="url">url地址</param>
        /// <returns>string</returns>
        private static string GetClassName(string url)
        {
            string[] parts = url.Split('/');
            string[] pps = parts[parts.Length - 1].Split('.');
            return pps[0];
        }

    }
}