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