多个缓存项的CacheDependency

我想在ASP.NET CacheObject中有一个项,如果它被更改,许多依赖项将被删除

所以。。在请求中

1. 如果出现提示并且它存在于缓存中,则删除根对象,所有依赖关系也将被删除
3. 将其他依赖于根对象的对象添加到缓存中

当我这样做的时候,我得到了一个错误“ An attempt was made to reference a CacheDependency object from more than one Cache entry "

有人找到办法了吗?

这里有一些代码,它不是我实际存储的,但它代表相同的任务

public class HomeController : Controller
{
    private const string ROOT_KEY = "ROOT";

    protected override void Initialize(System.Web.Routing.RequestContext requestContext)
    {   
        base.Initialize(requestContext);

        if(Request.QueryString["clearcache"]!=null){
            // removed the root, hopefully removing all dependents
            HttpContext.Cache.Remove(ROOT_KEY);
        }

        if (HttpContext.Cache[ROOT_KEY] == null)
        {
            // create the root entry
            HttpContext.Cache[ROOT_KEY] = string.Empty;
        }

        if(HttpContext.Cache[Request.Url.AbsolutePath]==null){

            // add the url if not already added
            HttpContext.Cache.Insert(
                Request.Url.AbsolutePath, string.Empty, 
                new CacheDependency(null, new []{ROOT_KEY}));
        }
    }
}