大家帮我看看我这段代码哪错了，List.Items.Count总是零

 //获取SPSite
                    using (SPSite site = new SPSite("http://egen32:2000/"))
                    {
                        //获取SPWeb
                        using (SPWeb web = site.OpenWeb())
                        { 
                          //提升权限
                            site.AllowUnsafeUpdates = true;                            //将文档库中的信息保存到SPList中
                            SPList list = web.Lists["DocumentTest"];