asp.net处理删除网站下文件夹导致iis重启session丢失的问题

1、新建一个类继承 IHttpModule

public class StopAppDomainRestartOnFolderDeleteModule : IHttpModule 
{ 
    private static bool DisableFCNs = false; 
    public void Init(HttpApplication context) 
    { 
        if (DisableFCNs)
            return; 
        PropertyInfo p = typeof(HttpRuntime).GetProperty("FileChangesMonitor", BindingFlags.NonPublic | BindingFlags.Public | BindingFlags.Static); 
        object o = p.GetValue(null, null); 
        FieldInfo f = o.GetType().GetField("_dirMonSubdirs", BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.IgnoreCase); 
        object monitor = f.GetValue(o); 
        MethodInfo m = monitor.GetType().GetMethod("StopMonitoring", BindingFlags.Instance | BindingFlags.NonPublic); 
        m.Invoke(monitor, new object[] { }); 
        DisableFCNs = true; 
    } 
    public void Dispose() 
    {
 
    } 
}

2、修改web.config文件

      <add name="StopAppDomainRestartOnFolderDeleteModule" type="StopAppDomainRestartOnFolderDeleteModule"/>