新手泛型赋值问题！求教
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.IO;
using System.Xml.Serialization;

namespace MangerFT.FS
{
    public partial class WebForm4 : System.Web.UI.Page
    {
        public static string UCFilePath = "D:\\UserConfig.xml";

        protected void Page_Load(object sender, EventArgs e)
        {

        }
        
        [Serializable]
        /// <summary>
        /// 用户信息类
        /// </summary>
        public class Userconfig
        {
            public List<UserDetail> ListUser;
        }

        
        [Serializable]
        public class UserDetail
        {
            private string id;
            /// <summary>
            /// 用户Id
            /// </summary>
            public string Id
            {
                get
                {
                    return id;
                }
                set
                {
                    id = value;
                }
            }

            private string name;
            /// <summary>
            /// 用户名
            /// </summary>
            public string Name
          &nbs