WriteLine("I can run everywhere!");
WriteLine($"OS Version is {Environment.OSVersion}.");

if (OperatingSystem.IsMacOS())
{
  WriteLine("I am macOS.");
}
else if (OperatingSystem.IsWindowsVersionAtLeast(major: 10, build: 22000))
{
  WriteLine("I am Windows 11.");
}
else if (OperatingSystem.IsWindowsVersionAtLeast(major: 10))
{
  WriteLine("I am Windows 10.");
}
else
{
  WriteLine("I am some other mysterious OS.");
}
WriteLine("Press ENTER to stop me.");
ReadLine();