怎么查看一个页面运行占用的内存？

RT
有代码如下：可是放到程序里总是显示错误，什么APP-WEB文件有错，别人说是位置放的不对，是放到PAGE-LOAD里了呀，问下应该怎么样才能显示呢？
ServerOS = Environment.OSVersion.ToString();                                 //操作系统：
         CpuSum = Environment.GetEnvironmentVariable("NUMBER_OF_PROCESSORS");         //CPU个数：
         CpuType = Environment.GetEnvironmentVariable("PROCESSOR_IDENTIFIER");        //CPU类型：
         ServerSoft = Request.ServerVariables["SERVER_SOFTWARE"];                     //信息服务软件：
         MachineName = Server.MachineName;                                            //服务器名
         ServerName = Request.ServerVariables["SERVER_NAME"];                         //服务器域名
         ServerPath = Request.ServerVariables["APPL_PHYSICAL_PATH"];                  //虚拟服务绝对路径
         ServerNet = ".NET CLR " + Environment.Version.ToString();                    //DotNET 版本
         ServerArea = (DateTime.Now - DateTime.UtcNow).TotalHours > 0 ? "+" + (DateTime.Now - DateTime.UtcNow).TotalHours.ToString() : (DateTime.Now - DateTime.UtcNow).TotalHours.ToString();    //服务器时区
         ServerTimeOut = Server.ScriptTimeout.ToString();                             //脚本超时时间
         ServerStart = ((Double)System.Environment.TickCount / 3600000).ToString("N2");   //开机运行时长
         PrStart = GetPrStart();                                                      //进程开始时间
         AspNetN = GetAspNetN();                                                      //AspNet 内存占用
         AspNetCpu = GetAspNetCpu();                                                  //AspNet CPU时间
         ServerSessions = Session.Contents.Count.ToString();                          / ssion总数
         ServerApp = Application.Contents.Count.ToString();                           //Application总数
         ServerCache = Cache.Count.ToString();                                        //应用程序缓存总数
         ServerAppN = GetServerAppN();                                                //应用程序占用内存
   ServerFso = Check("Scripting.FileSystemObject");                             //FSO 文本文件读写
         ServerTimeOut = Server.ScriptTimeout.ToString() + "毫秒";                    //本页执行时间