how i name .net concentration settlement record management line parameter?

i overrule a customary app.config flitting management line parameter. i change default concentration settlement record i opening configurationmanager.appsettings i am accessing config record specified management line?

edit:

it turns out repremand proceed bucket config record opposite name exe and .config openmappedexeconfiguration. e.g.

execonfigurationfilemap configfile = new execonfigurationfilemap();
configfile.execonfigfilename = path.combine(environment.currentdirectory, "shell2.exe.config");
currentconfiguration = configurationmanager.openmappedexeconfiguration(configfile,configurationuserlevel.none);

this partially works. i keys appsettings domain nonetheless values null.