C# 스트림리더

public class StreamReader: System.IO.TextReader

using System;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
//a namespace called program is defined
namespace program
{
//a class called check is defined
class check
{
//main method is called
static void Main(string[] args)
{
//the path of the file and the file name is assigned to a string variable
String def = @"D:\imp.txt";
//an instance of the string writer class is created, and the path of the file is passed as a parameter to append text to the file
using (StreamWriter stwr = File.AppendText(def))
{
//data to be appended to the file is included
stwr.WriteLine("Welcome to StreamWriter class in C#");
//the instance of the streamwriter class is closed after writing data to the File
stwr.Close();
try
{
// an instance of stream reader class is created, and data is read from the file by taking the path of the file as parameter
using (StreamReader read = new StreamReader(def))
{
//a string variable is defined
string line1;
// Data is being read one line after the other
while ((line1 = read.ReadLine()) != null)
{
Console.WriteLine(line1);
}
}
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
Console.ReadKey();
}
}
}
}

using System;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
//a class called check is defined
class check
{
//main method is called
static void Main()
{
String fin = @"D:\Ex.txt"
//an instance of streamwriter class is created and the path of the file is passed as a parameter
using (StreamWriter stwf = new StreamWriter(fin))
{
//write() method of stream writer class is used to write the first line so that the next line continues from here
stwf.Write("Welcome to StreamWriter class in C# and ");
//writeline() method is used to write the second line and the next line starts from a new line
stwf.WriteLine("this program is demonstration of StreamWriter class in C# ");
//writeline() method is used to write the third line and the next line starts from a new line
stwf.WriteLine("I hope you are learning ");
stwf.Dispose();
try
{
// an instance of stream reader class is created, and data is read from the file by taking the path of the file as parameter
using (StreamReader read = new StreamReader(fin))
{
//a string variable is defined
string line1;
// Data is being read one line after the other
while ((line1 = read.ReadLine()) != null)
{
Console.WriteLine(line1);
}
}
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
Console.ReadKey();
}
}
}