protected void Reload_Click(object sender, EventArgs e)
{
    HttpRuntime.UnloadAppDomain();
}

protected void Restart_Click(object sender, EventArgs e)
{
    using (var sc = new System.ServiceProcess.ServiceController("IISAdmin"))
    {
        sc.Stop();
        sc.Start();
    }
}

Process iisreset = new Process();
iisreset.StartInfo.FileName   = "iisreset.exe";
iisreset.StartInfo.Arguments = "computer name";
iisreset.Start();

//iisreset.exe is located in the windows\system32 folder.

（http://www.velocityreviews.com/forums/t300488-how-can-i-restart-iis-or-server-from-aspx-page-or-web-service.html）（英文）

string processName = "aspnet_wp";

System.OperatingSystem os = System.Environment.OSVersion;

//Longhorn and Windows Server 2003 use w3wp.exe
if((os.Version.Major == 5 && os.Version.Minor > 1) || os.Version.Major ==6)
   processName = "w3wp";

foreach(Process process in Process.GetProcessesByName(processName))
   {
      Response.Write("Killing ASP.NET worker process (Process ID:" +
      process.Id + ")");
      process.Kill();
   }

运行此代码的服务器上是否承载了多个网站？如果是，您可能需要查看System.DirectoryServices命名空间，然后重新启动各个网站