详解C#如何读写config配置文件

测试代码如下：

 class Program
 {
  static void Main(string[] args)
  {
   try
   {
    //string file = System.Windows.Forms.Application.ExecutablePath + ".config";
    //string file1 = AppDomain.CurrentDomain.SetupInformation.ConfigurationFile;
    string serverIP = ConfigHelper.GetAppConfig("ServerIP");
    string db = ConfigHelper.GetAppConfig("DataBase");
    string user = ConfigHelper.GetAppConfig("user");
    string password = ConfigHelper.GetAppConfig("password");

    Console.WriteLine(serverIP);
    Console.WriteLine(db);
    Console.WriteLine(user);
    Console.WriteLine(password);

    ConfigHelper.UpdateAppConfig("ServerIP", "192.168.1.11");
    string newIP = ConfigHelper.GetAppConfig("ServerIP");
    Console.WriteLine(newIP);

    Console.ReadKey();
   }
   catch (Exception ex)
   {
    Console.WriteLine(ex.Message);
   }
  }
 }