[c#] App.Config file in console application C#

I have a console application in which I want to write the name of a file.

Process.Start("blah.bat");

Normally, I would have something like that in windows application by writing the name of the file 'blah.bat' to Settings file in Properties.
However, here I didn't find any Settings file and I added an app.config for the same purpose.

I am not sure what to write here in app.config, that would lead to me to achieve similar thing as in Windows Forms.

For eg: In windows forms. Process.Start(Properties.Settings.Default.BatchFile);
where BatchFile is a string in settings file in Properties.

For .NET Core, add System.Configuration.ConfigurationManager from NuGet manager.
And read appSetting from App.config

<appSettings>
  <add key="appSetting1" value="1000" />
</appSettings>

Add System.Configuration.ConfigurationManager from NuGet Manager

ConfigurationManager.AppSettings.Get("appSetting1")

use this

System.Configuration.ConfigurationSettings.AppSettings.Get("Keyname")