Using Statement: using DIRECTIVE, not using statement : Using Statement « File Directory Stream « C# / CSharp Tutorial

1. C# / CSharp Tutorial
2. File Directory Stream
3. Using Statement

using System;              
using System.IO; //using DIRECTIVE, not using statement

class MainClass
{
   static void Main()
   {
      using (TextWriter tw = File.CreateText("test.txt"))// using statement 
      {
         tw.WriteLine("string");
      }

      using (TextReader tr = File.OpenText("test.txt"))
      {
         string str;
         while (null != (str = tr.ReadLine()))
            Console.WriteLine(str);
      }
   }
}

string