// example from Lecture 7 on Streams

using System;
using System.IO;

public class FileReadWrite{
	public static void Main(){
	  // a safe way of writing to a file
	  try{
	    StreamWriter sw = new StreamWriter("test.txt"); 
	    sw.WriteLine("Hello World!"); 
	    sw.Close(); 

	    // append more text to the file
	    StreamWriter sw1 = new StreamWriter("test.txt", true); 
	    sw1.WriteLine("Hello World again!"); 
	    sw1.Close(); 
	  }
	  catch(IOException ex){
	    Console.WriteLine(ex.Message); }	

	  // std iteration over the contents of a file
	  StreamReader sr = new StreamReader("test.txt");
	  string inValue = "";
	  while((inValue = sr.ReadLine()) != null)
	    Console.WriteLine(inValue); 	
	}
}