public Object Add (
string key,
Object value,
CacheDependency dependencies,
DateTime absoluteExpiration,
TimeSpan slidingExpiration,
CacheItemPriority priority,
CacheItemRemovedCallback onRemoveCallback
)

ArrayList myarray = new ArrayList();
        myarray.Add("1.学习天地1");
        myarray.Add("2.学习天地1");
        myarray.Add("3.学习天地1");
        myarray.Add("4.学习天地1");
        string item = "这是一条缓存";
        Cache["item"] = item;//赋值
        Response.Write(Cache.Get("item") + "<br/>");
 
        item = "更改一条缓存数据";
        Cache.Insert("item", item);//更改缓存值
        Response.Write(Cache.Get("item") + "<br/>");
 
 
        //Cache.Remove("item"); //移除缓存值
        //Response.Write(Cache.Get("item") + "<br/>");
 
        Response.Write(Cache["item"].GetType().Name + "<br/>");//GetType获得Cache的数据类型 
        Response.Write(Cache.Get("Array") + "<br/>");//GetType获得Cache的数据类型
 
 
        IDictionaryEnumerator bianli = Cache.GetEnumerator();//遍历整个缓存
        while (bianli.MoveNext())
        {
          Response.Write(bianli.Value + "<br/>");
        }
        Response.Write("获取缓存数量：" + Cache.Count);
 
        if (Cache["Array"] == null)
        {//当缓存Array不存在时，添加缓存，缓存时间设定为5秒
          Cache.Add("Array", myarray, null, DateTime.Now.AddSeconds(5), TimeSpan.Zero, CacheItemPriority.Normal, null);
        }

<?xml version="1.0" encoding="utf-8" ?>
<book>
 <bookinfo>
  <name>英国古代</name>
  <price>28.00</price>
 </bookinfo>
 <bookinfo>
  <name>中国历史</name>
  <price>20.00</price>
 </bookinfo>
 <bookinfo>
  <name>中国历史1232sdf2</name>
  <price>20.00</price>
 </bookinfo>
</book>

private static CacheDependency Mydata;
    protected void Page_Load(object sender, EventArgs e)
    {
      if (!IsPostBack)
      {
        DataSet ds = new DataSet();
        ds.ReadXml(Server.MapPath("Cachexml.xml"));//读取Xml里面数据
        if (Cache["CXml"] == null)
        {
          //创建缓存依赖项
          Mydata = new CacheDependency(Server.MapPath("Cachexml.xml"));
          Cache.Add("CXml", ds, Mydata, DateTime.Now.AddSeconds(10), TimeSpan.Zero, CacheItemPriority.Normal, null);
        }
      }
    }
 
    protected void Button1_Click(object sender, EventArgs e)
    {
      if (Mydata.HasChanged)
      {//判断缓存是否更改
        Response.Write("缓存已经更改，更改时间为"+Mydata.UtcLastModified);//获取缓存的跟新时间
      }
      if (Cache["CXml"] == null)
      {//当xml文件被改动时缓存从新加载
        DataSet ds = new DataSet();
        ds.ReadXml(Server.MapPath("Cachexml.xml"));//读取Xml里面数据
        //创建缓存依赖项
        Mydata = new CacheDependency(Server.MapPath("Cachexml.xml"));
        Cache.Add("CXml", ds, Mydata, DateTime.Now.AddSeconds(60), TimeSpan.Zero, CacheItemPriority.Normal, null);
      }
      this.GridView1.DataSource = Cache["CXml"];
      this.GridView1.DataBind();
    }