static void Main(string[] args)
        {

            Console.Out.WriteLine("OS Information");
            Console.Out.WriteLine("The Machine Name => "+Environment.MachineName);
            Console.Out.WriteLine("The OS Version => "+Environment.OSVersion);
            Console.Out.WriteLine("The User Domain Name => "+Environment.UserDomainName);
            Console.Out.WriteLine("The Current UserName => "+Environment.UserName);
            Console.ReadKey();

        }

this program view some of  OS information try it you will not lose thing.

OS Information using C#

c#

C#