gistfile1.cs

using System;

class Test {
	public static void Main ()
	{
		var v = Environment.OSVersion;
		Console.WriteLine ("      Platform: {0}", v.Platform);
		Console.WriteLine ("  Service Pack: {0}", v.ServicePack);
		Console.WriteLine ("       Version: {0}", v.Version);
		Console.WriteLine ("Version String: {0}", v.VersionString);
	}
}