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"));
    }
}

   
     

   
 
  using System;
  using System.Windows.Forms;
  using Microsoft.Win32;

  public class MyMessageFilter : IMessageFilter 
  {
    public bool PreFilterMessage(ref Message m) 
    {
      // Intercept the left mouse button down message.
      if (m.Msg == 513) 
      {
        Console.WriteLine("WM_LBUTTONDOWN is: " + m.Msg);
        return true;
      }
      return false;
    }
  }

  public class mainForm : System.Windows.Forms.Form
  {
    private MyMessageFilter msgFliter = new MyMessageFilter();

    public mainForm()
    {
      GetStats();
      Application.ApplicationExit += new EventHandler(Form_OnExit);
      Application.AddMessageFilter(msgFliter);    
    }

    [STAThread]
    static void Main() 
    {
      Application.Run(new mainForm());
    }

    private void GetStats()
    {
      Console.WriteLine(Application.CompanyName+ "  Company:");
      Console.WriteLine(Application.ProductName+ " App Name:");
      Console.WriteLine(Application.StartupPath);
    }

    // Event handlers.
    private void Form_OnExit(object sender, EventArgs evArgs) 
    {
      Console.WriteLine("Exit", "This app is dead...");
      Application.RemoveMessageFilter(msgFliter);
    }
  }