获取XML文件某一个节点的值

 public static string Select(string xmlpath, string xmlsinglenode)
    {
        try
        {
            XmlDocument xmlDoc = new XmlDocument();
            xmlDoc.Load(xmlpath);
            string selectString = xmlDoc.SelectSingleNode(xmlsinglenode).InnerText;
            return selectString;
        }
        catch (Exception ex)
        {
            Log.SystemLog(ex.Message);
            return "";
        }
    }