public void SetXml(string url)
{
 
private XmlDocument _XmlDoument = new XmlDocument();_XmlDoument.Load(@"app.config");_XmlDoument.SelectSingleNode(@"configuration/applicationSettings/jmwc.Properties.Settings/setting/value").InnerText = url;
           
_XmlDoument.Save(@"app.config");}
为什么它老说访问被拒绝啊?“_XmlDoument.Save(@"app.config");”就这句老出错