How to add App.config file

Add the App.config File:

• Right-click on your project in the Solution Explorer.
• Select Add > New Item.
• In the "Add New Item" dialog, look for Application Configuration File or simply Config File.
• Name the file App.config (it should automatically suggest this name) and click Add.

Edit the App.config File:

• Once added, you can open the App.config file and add your configuration settings as needed. The file is in XML format, so you can define connection strings, app settings, and more.

Save and Build: After adding your settings, save the file and rebuild your project to ensure the configurations are applied