private void SaveAppSetting(string key, string value)
{
Configuration manager = OpenConfigFile();
if (manager != null)
{
// NOTE: Most likey scenario in a production environment
if (!string.IsNullOrEmpty(manager.AppSettings.Settings[key].Value))
manager.AppSettings.Settings.Remove(key);
manager.AppSettings.Settings.Add(key, value);
manager.Save(ConfigurationSaveMode.Modified);
ConfigurationManager.RefreshSection("appSettings");
}
else
{
// NOTE: Alternate scenario when settings cannot be saved through a ConfigurationManager, particulary when running under the Visual Studio Web Development Server (as opposed to IIS or IIS Express).
ConfigurationEditor editor = new ConfigurationEditor(Path.Combine(Server.MapPath(LocalWebConfig), "Web.config"));
if (editor.KeyExists(key))
editor.UpdateKey(key, value);
else
editor.AddKey(key, value);
editor.SaveDoc();
}
}