writing to a config file

Question

Hello I copied this code from MS web site trying to add a new key to current config file but it does not save the config file at all when my app exits any idea? // Open App.Config of executable System.Configuration.Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None); config.AppSettings.Settings.Add(TestKey gdhgasdkjadhsj); // Save the configuration file. config.Save(ConfigurationSaveMode.Full); How could this code have no exceptions whatsoever but just not doing what Microsoft claim it should do -- save the damn config file?

John Penn · Answer

This MSDN example worked for me: using System; using System.Collections.Specialized; using System.Collections.ObjectModel; using System.Collections; using System.Text; using System.Configuration; namespace ConsoleApplication2 { class Program { static void Main(string[] args) { System.Configuration.Configuration config = ConfigurationManager.OpenExeConfiguration( ConfigurationUserLevel.None); // Add an entry to appSettings. int appStgCnt = ConfigurationManager.AppSettings.Count; string newKey = NewKey + appStgCnt.ToString(); string newValue = DateTime.Now.ToLongDateString() +   + DateTime.Now.ToLongTimeString(); config.AppSettings.Settings.Add(newKey newValue); // Save the configuration file. config.Save(ConfigurationSaveMode.Modified); // Force a reload of the changed section. ConfigurationManager.RefreshSection(appSettings); } } } Since the app is named ConsoleApplication2.exe the config file that it's saving to is ConsoleApplication2.exe.Config not App.config.