将更改保存到C＃中的App.config

Question

I Created a windows application that uses app.confing and updates app.config when needed. When I run the application in debug mode it's working fine, but after I created the .exe file and installed it's not updating the app.confing file anymore.

I unchecked the Enable the Visual Studio hosting process to no luck.

This is the code I'm trying:

var config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
//Updating the config values here 
config.Save(ConfigurationSaveMode.Modified);
ConfigurationManager.RefreshSection("appSettings");

Answer 1

Try calling this overload;

public void Save(
    ConfigurationSaveMode saveMode,
    bool forceSaveAll
)

passing forceSaveAll=true ?

Answer 2

Check if the app config is being hosted in the Program Files folder (or child folder) once installed. Since in debug mode, you're running from a location in which you have write permissions, and since once installed, application config (not user config) is often sitting in Program Files, you typically won't have write permissions. You might try running the application as an admin to see if it works in that mode, or just go examine that directory and check the write bits for your login (assuming app is running as you). Try to modify that file manually. If you can't, that's your problem.