using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine($"{nameof(System.Runtime.InteropServices.RuntimeInformation.OSDescription)}: {System.Runtime.InteropServices.RuntimeInformation.OSDescription}");

        Console.WriteLine($"{nameof(Environment.OSVersion.Version)}: {Environment.OSVersion.Version}");

        Console.WriteLine($"{nameof(Environment.UserName)}: {Environment.UserName}");

        Console.WriteLine($"{nameof(System.IO.Path.DirectorySeparatorChar)}: {System.IO.Path.DirectorySeparatorChar}");

        Console.WriteLine($"{nameof(System.IO.Path.AltDirectorySeparatorChar)}: {System.IO.Path.AltDirectorySeparatorChar}");

    }

}