停止IIS服务
ServiceController sc = new ServiceController("iisadmin");
if(sc.Status==ServiceControllerStatus.Running)

{

sc.Stop();
}

重启IIS服务
ServiceController sc = new ServiceController("iisadmin");
 sc.Start();

重启进程
using System.Diagnostics;
Process.Start("iisreset");

转自：http://blog.csdn.net/educast/article/details/6227541