Winform读写App.config文件以及重启程序

        //重启主程序
        //System.Diagnostics.Process.Start(System.Reflection.Assembly.GetExecutingAssembly().Location);
        #region 读存app.config字段值
        public static string GetConfigValue(string appKey)
        {
            XmlDocument xDoc = new XmlDocument();
            try
            {
                //缓存路径
                xDoc.Load(System.Windows.Forms.Application.ExecutablePath + ".config");
                System.Xml.XmlNode xNode;
                System.Xml.XmlElement xElem;
                xNode = xDoc.SelectSingleNode("//appSettings");
                xElem = (System.Xml.XmlElement)xNode.SelectSingleNode("//add[@key=‘" + appKey + "‘]");
                if (xElem != null)
                    return xElem.GetAttribute("value");
                else
                    return "";
            }
            catch
            {
                return "";
            }
        }


        public static void SetConfigValue(string AppKey, string AppValue)
        {
            XmlDocument xDoc = new XmlDocument();
            xDoc.Load(System.Windows.Forms.Application.ExecutablePath + ".config");

            XmlNode xNode;
            XmlElement xElem1;
            XmlElement xElem2;
            xNode = xDoc.SelectSingleNode("//appSettings");

            xElem1 = (XmlElement)xNode.SelectSingleNode("//add[@key=‘" + AppKey + "‘]");
            if (xElem1 != null) xElem1.SetAttribute("value", AppValue);
            else
            {
                xElem2 = xDoc.CreateElement("add");
                xElem2.SetAttribute("key", AppKey);
                xElem2.SetAttribute("value", AppValue);
                xNode.AppendChild(xElem2);
            }
            xDoc.Save(System.Windows.Forms.Application.ExecutablePath + ".config");
        }
        #endregion