using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;


  internal class OSHelper
  {
    internal static bool Is2003VistaOrGreater { get { return Environment.OSVersion.Version.CompareTo(new Version(5, 2)) >= 0; } }
    internal static bool IsVistaOrGreater { get { return Environment.OSVersion.Version.CompareTo(new Version(6, 0)) >= 0; } }
  }

   
     

   
  

using System;

class MainClass {
    public static void Main() {
        Console.WriteLine("System folder : " + Environment.SystemDirectory);
    }
}

   
     

   
  

using System;

class MainClass {
    public static void Main() {
        Console.WriteLine("Current folder : " + Environment.CurrentDirectory);
    }
}

   
     

   
  

using System;

class MainClass {
    public static void Main() {
        foreach (string s in Environment.GetLogicalDrives()) {
            Console.WriteLine("Logical drive : " + s);
        }
    }
}

   
     

   
  

using System;

class MainClass {
    public static void Main() {
        Console.WriteLine("Ticks since startup : " + Environment.TickCount);
    }
}

   
     

   
  

using System;

class MainClass {
    public static void Main() {
        Console.WriteLine("Shutting down? : " + Environment.HasShutdownStarted);
    }
}

   
     

   
  

using System;

class MainClass {
    public static void Main() {
        Console.WriteLine("Is interactive? : " + Environment.UserInteractive);
    }
}