https://learn.microsoft.com/en-us/dotnet/api/system.configuration.configurationmanager.openmachineconfiguration?view=netframework-4.8.1&viewFallbackFrom=windowsdesktop-10.0
ConfigurationManager.OpenMachineConfiguration Method (System.Configuration) | Microsoft Learn
Opens the machine configuration file on the current computer as a Configuration object.
system configurationconfigurationmanagermethodmicrosoftlearn