How to edit application configuration settings? App.config best way to go?

Question

For my project I have settings that I added through the Settings in the project properties.

I quickly discovered that editing the app.config file directly seems to

Answer 1

 System.Configuration.Configuration config =ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);

        config.AppSettings.Settings["oldPlace"].Value = "3";     
        config.Save(ConfigurationSaveMode.Modified);
        ConfigurationManager.RefreshSection("appSettings");

Try with this code , is easy.

Atte: Erick Siliezar