public static string IsolateCallV1(PageContentHandler pHandler)        {            string name = Guid.NewGuid().ToString("N");            var domain = AppDomain.CreateDomain(name);            try            {                var proxy = (IAppEntry)domain.CreateInstanceAndUnwrap("AnfleCrawler.Common", "AnfleCrawler.Common.IsolateProxy");                string ret = (string)proxy.DoEntry(pHandler);                if (ret == null)                {                    throw new InvalidOperationException("IsolateProxy");                }                return ret;            }            finally            {                //AppDomain不能即时卸载？不能在IDisposable中卸载？                //App.LogInfo("IsolateCollect Unload {0}@{1}", domain.FriendlyName, AppDomain.CurrentDomain.FriendlyName);                //AppDomain.Unload(domain);                new JobTimer(state =>                {                    try                    {                        var d = (AppDomain)state;                        //if (d.IsFinalizingForUnload())                        //{                        //    return;                        //}                        App.LogInfo("IsolateCollect Unload {0}", d.FriendlyName);                        AppDomain.Unload(d);                    }                    catch (Exception ex)                    {                        App.LogError(ex, "IsolateCollect");                    }                }, DateTime.Now.AddSeconds(20d)).Start(domain);            }        }