判断是否cache

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

public partial class Admin_Cache : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        InitCacheList();
    }
    private void InitCacheList()
    {
        System.Collections.IDictionaryEnumerator coll = Cache.GetEnumerator();
        while (coll.MoveNext() && coll.Current != null)
            label7.Text += coll.Key.ToString()+"<br/>";
        // Cache.Remove(coll.Key.ToString());
    }
}