using System.IO;
public class Program {
   public static void Main() {
      StreamReader inStream = File.OpenText( @"G:\source\Test.txt" );
      StreamWriter outStream = new StreamWriter(@"G:\source\TestCopy.txt");
      // Copy lines of the source file in the destination file.
      string sTmp;
      do {
         sTmp = inStream.ReadLine();
         outStream.WriteLine( sTmp );
         System.Console.WriteLine( sTmp );
      }
      while ( sTmp != null );
      // Close streams.
      inStream.Close();
      outStream.Close();
   }
}