Asp.net给站点某目录增加Aspnet用户

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

using System.IO;
using System.Net;
using System.Security.AccessControl;
using System.Security.Principal;

public partial class ACLChange : System.Web.UI.Page
"images";

    protected void Page_Load(object sender, EventArgs e)
    "\\ASPNET", FileSystemRights.FullControl, AccessControlType.Allow));

        dirinfo.SetAccessControl(dirsecurity);
    }
}