动态调用webservice时提示“此 XML 文档中禁用 DTD”

悬赏园豆：10 [已关闭问题] 关闭于 2014-09-19 16:32

    public static object InvokeWebService(string url, string classname, string methodname, object[] args)
        {
            string @namespace = "EnterpriseServerBase.WebService.DynamicWebCalling";
            if ((classname == null) || (classname == ""))
            {
                classname = GetWsClassName(url);
            }
            WebClient wc = null;
            Stream stream = null;
            CSharpCodeProvider csc = null;
            try
            {
                //获取WSDL
                wc = new WebClient();
                stream = wc.OpenRead(url + "?WSDL");
            //这里报错
                ServiceDescription sd = ServiceDescription.Read(stream);
}