It gets cached, on first access of a property, so it does not read from the physical file each time you ask for a value. This is why it is necessary to restart an Windows app (or Refresh the config) to get the latest value, and why an ASP.Net app automatically restarts when you edit … Read more
Apache Commons Configuration works great. It supports having the configuration stored in a wide range of formats on the backend including properties, XML, JNDI, and more. It is easy to use and to extend. To get the most flexibility out of it use a factory to get the configuration and just use the Configuration interface … Read more
I know I’m late 🙂 But this how i do it: public static void AddOrUpdateAppSettings(string key, string value) { try { var configFile = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None); var settings = configFile.AppSettings.Settings; if (settings[key] == null) { settings.Add(key, value); } else { settings[key].Value = value; } configFile.Save(ConfigurationSaveMode.Modified); ConfigurationManager.RefreshSection(configFile.AppSettings.SectionInformation.Name); } catch (ConfigurationErrorsException) { Console.WriteLine(“Error writing app settings”); } } … Read more
WebConfigurationManger knows how to deal with configuration inheritance within a web application. As you know, there could be several web.config files in one applicaion – one in the root of the site and any number in subdirectories. You can pass path to the GetSection() method to get possible overridden config. If we’d looke at WebConfigurationManager … Read more
MSDN: Configuration Manager.AppSettings if (ConfigurationManager.AppSettings[name] != null) { // Now do your magic.. } or string s = ConfigurationManager.AppSettings[“myKey”]; if (!String.IsNullOrEmpty(s)) { // Key exists } else { // Key doesn’t exist }
Try this AppDomain.CurrentDomain.SetupInformation.ConfigurationFile
This works for me: string value = System.Configuration.ConfigurationManager.AppSettings[key];