How to add config file in window installer

Question

I have a window application in vs 2022 and also setup the installer (.msi) with application. It is working fine till now but as per new requirement i need to add config file and add all credential over there. I added there and now my application is correctly reading values from app.config but problem is when i create Installer (.msi) after install that on another machine then application is not reading value from app.config file. I don't want to use any third party tool. Please help on this

Answer 1

App.config:

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <startup> 
        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.7.2" />
    </startup>
    <appSettings>
        <add key="MySetting" value="HelloWorld" />
    </appSettings>
</configuration>

Windows App: read config sample

//using System.Configuration;
    string mySettingValue = ConfigurationManager.AppSettings["MySetting"];
    MessageBox.Show("MySetting value: " + mySettingValue);

Right click installer project -> View -> File system

Right click Application Folder -> Add -> Project output

Select the Windows app project - > Primary output