I can't modify the app.config file

Question

What's wrong with the following code:

private static void UpdateAppSettings(string settingName, string settingValue)
{
    if (settingName == null) throw new ArgumentNullException("settingName");
    if (settingValue == null) throw new ArgumentNullException("settingValue");

    var config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
    var appSettings = config.AppSettings;

    var setting = appSettings.Settings[settingName];
    setting.Value = settingValue;

    config.Save(ConfigurationSaveMode.Modified);
    ConfigurationManager.RefreshSection("AppSettings");
}

I don't know why it doesn't save the new settings. It first opens the app.config file. After going to appsetting area. It then finds a specific key as settingName and changes the value to settingValue. Afterwards, it saves the file and refreshes it. It almost works; up to config.Save(...). But after that I don't know what happens.

Do you get an error? Is the file not updated? More information is needed on exactly *what* your problem is. — Samuel Slade, Jan 26 '12 at 12:50
have you tried it in debug or release mode? As far as I can remember this only works proper with release. — Steve, Jan 26 '12 at 12:51
check the following: http://stackoverflow.com/questions/758389/why-are-application-settings-read-only-in-app-config — Davide Piras, Jan 26 '12 at 12:56
I didn't get an error. but my app config file didn't change. — aakpro, Jan 27 '12 at 07:42

score 1 · Answer 1 · edited May 23 '17 at 12:20

1

This question seems to be the same as what you are asking.

The answer looks to be this:

config.AppSettings[settingName] = settingValue;

EDIT:

This question has the answer I think

config.AppSettings.Settings[settingName]

edited May 23 '17 at 12:20

Community

1
1

answered Jan 26 '12 at 12:53

Carl Winder

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I can't modify the app.config file

1 Answers1