Using statement to deal with multiple resources : Using Statement « File Directory Stream « C# / CSharp Tutorial

using System;
using System.Collections.Generic;
using System.Text;
using System.IO;             

class MainClass
{
   static void Main()
   {
      using (TextWriter tw1 = File.CreateText("test.txt"),
                        tw2 = File.CreateText("test2.txt"))
      {
         tw1.WriteLine("test");
         tw2.WriteLine("test1");
      }

      using (TextReader tr1 = File.OpenText("test.txt"),
                        tr2 = File.OpenText("test2.txt"))
      {
         string str;
         while (null != (str = tr1.ReadLine()))
            Console.WriteLine(str);
            
         while (null != (str = tr2.ReadLine()))
            Console.WriteLine(str);
      }
   }
}

test
test1

15.33.Using Statement
	15.33.1.	Use object inside using statement
	15.33.2.	Create object inside the using statement
	15.33.3.	Using Statement: using DIRECTIVE, not using statement
	15.33.4.	Use FileStream inside a using statement
	15.33.5.	Dispose a StreamWriter by using 'using'
	15.33.6.	Using statement to deal with multiple resources
	15.33.7.	Nested using statement