记录asp.net网站是什么原因导致停止运行的代码

protected void Application_End(object sender, EventArgs e) 
{ 
RecordEndReason(); 
} 
/// <summary> 
/// 记录网站停止运行原因 
/// </summary> 
protected void RecordEndReason() 
{ 
HttpRuntime runtime = (HttpRuntime)typeof(System.Web.HttpRuntime).InvokeMember("_theRuntime", System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Static | System.Reflection.BindingFlags.GetField, 
null, 
null, 
null); 
if (runtime == null) 
return; 
string shutDownMessage = (string)runtime.GetType().InvokeMember("_shutDownMessage", 
System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.GetField, 
null, 
runtime, 
null); 
string shutDownStack = (string)runtime.GetType().InvokeMember( 
"_shutDownStack", 
System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.GetField, 
null, 
runtime, 
null); 
string reasonString="网站Application_End，停止运行,shutDownMessage=" + shutDownMessage + ",shutDownStack=" + shutDownStack; 
LogHelper.WriteErrorLog(reasonString,null); 
LogHelper.WriteSmtp(reasonString, null); 
//以下方法将重启的原因和重启时的堆栈信息记录到了windows的事件查看器中,当然你也可以记录到文本文件中。 
//EventLog log = new EventLog(); 
//log.Source = "ASP.NET 2.0.50727.0"; 
//log.WriteEntry(String.Format("\r\n\r\n_shutDownMessage={0}\r\n\r\n_shutDownStack={1}", shutDownMessage, shutDownStack), EventLogEntryType.Information); 
} 
 
效果截图