Check if .NET Core/5+ app is running elevated

check_admin_or_root.cs

// To check if you are running as root on Unix:
//    1. Add a PackageReference to Mono.Posix.NETStandard
//    2. Change IsAdminstrator to the following:

public static bool IsAdministrator =>
	RuntimeInformation.IsOSPlatform(OSPlatform.Windows)
		? new WindowsPrincipal(WindowsIdentity.GetCurrent())
			.IsInRole(WindowsBuiltInRole.Administrator)
		: Mono.Unix.Native.Syscall.geteuid() == 0;


// Source: https://github.com/dotnet/runtime/issues/25118#issuecomment-367407469