IIS application pool reclamation solution to the problem of timing execution program stop in Application_Start

However, no one visited the website again during this period. As a result, the program code in Application_Start was not executed at a fixed time. After searching on the Internet for 1 time, I found a solution.

 
void Application_End(object sender, EventArgs e) 
{ 
//  Code that runs when the application is closed  
// Solve the application pool recycling problem  
System.Threading.Thread.Sleep(5000); 
string strUrl = " Web site address "; 
System.Net.HttpWebRequest _HttpWebRequest = (System.Net.HttpWebRequest)System.Net.WebRequest.Create(strUrl); 
System.Net.HttpWebResponse _HttpWebResponse = (System.Net.HttpWebResponse)_HttpWebRequest.GetResponse(); 
System.IO.Stream _Stream = _HttpWebResponse.GetResponseStream();// Gets a stream of bytes to write back  
}