[C#] 파일 읽기와 쓰기 처리

using System.IO;
using System.Xml;


string strSaveFilePath = "C:\\test.txt"; 

StreamReader SRead = new StreamReader(strSaveFilePath, System.Text.Encoding.UTF8);

string strFileLine = string.Empty;
while((strFileLine = SRead.ReadLine()) != null)
{
    Console.WriteLine(strFileLine); 
}

SRead.Close();


string strTest = "testtest";
StreamWriter SWrite = new StreamWriter(strSaveFilePath,false,System.Text.Encoding.UTF8);

SWrite.WriteLine(strTest);
SWrite.Close();