Nested using statement : Using Statement : File Directory Stream C# Examples

    
using  System;
using  System.IO;

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

            using  (TextReader  tr  =  File.OpenText("test.txt"))
            {
                  string  str;

                  while  (null  !=  (str  =  tr.ReadLine()))
                        Console.WriteLine(str);

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