using System;

class MainClass {
    public static void Main() {
        Console.WriteLine("Command line : " + Environment.CommandLine);
    }
}

   
     

   
  

using System;
using System.Windows.Forms;
   
class MyDocumentsFolder
{
     public static void Main()
     {
          Console.WriteLine(Environment.GetFolderPath(Environment.SpecialFolder.Personal));

        foreach (Environment.SpecialFolder s in
            Enum.GetValues(typeof(Environment.SpecialFolder))) {
            Console.WriteLine("{0} folder : {1}", s, Environment.GetFolderPath(s));
        }
          
     }
}

   
     

   
  

using System;
using System.Windows.Forms;
   
class MyDocumentsFolder
{
     public static void Main()
     {
          Console.WriteLine(Environment.GetFolderPath(Environment.SpecialFolder.Personal));
          
     }
}

   
     

   
  

using System;
class MainClass
{
    public static void Main(string[] args)
    {
         Console.WriteLine(Environment.CommandLine);
         foreach (string s in Environment.GetCommandLineArgs())
         {
             Console.WriteLine(s);
         }
    }
}

   
     

   
  


using System;
using System.Collections;

class MainClass {
    public static void Main() {
        IDictionary vars = Environment.GetEnvironmentVariables(EnvironmentVariableTarget.Process);
        foreach (string s in vars.Keys) {
            if (s.ToUpper().StartsWith("U")) {
                Console.WriteLine(s + " = " + vars[s]);
            }
        }
    }
}

   
     

   
  


using System;
using System.Collections;

class MainClass {
    public static void Main() {
        Console.WriteLine(Environment.ExpandEnvironmentVariables("The Path on %computername% is %Path%"));


    }
}

   
     

   
  
using System;
using System.Collections;

class MainClass {
    public static void Main() {
        Console.WriteLine("Path = " + Environment.GetEnvironmentVariable("Path"));
    }
}