c# 用Dataset 动态修改配置参数

DataSet dx = new DataSet();
dx.ReadXml(Application.ExecutablePath + ".config", XmlReadMode.InferSchema);
DataRow[] dtTmp = dx.Tables["setting"].Select("name = 'DepartName'");
dtTmp[0]["Value"] = txbxTitle.Text;
dx.WriteXml(Application.ExecutablePath + ".config");

//刷新应用程序设置，这样下次读取时才能读到最新的值。
Properties.Settings.Default.Reload();