Get or set the fully qualified path of the current working directory in CSharp

/* w w  w . ja va 2  s . c  om*/
using System.IO;
using System;
public class MainClass{
  public static void Main(String[] argv){  
    // Change the directory to %WINDIR%              
    Environment.CurrentDirectory = Environment.GetEnvironmentVariable("windir");    
    DirectoryInfo info = new DirectoryInfo(".");
    Console.WriteLine("Directory Info:   "+info.FullName);

  }
}