using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace ReadWriteFile

{

class Program

{

static void Main(string[] args)

{

string data = "Maple, please keep do it!";

String filePath = WriteFile(data);

Console.WriteLine(filePath);

string strData = ReadFile(filePath);

Console.WriteLine(strData);

Console.ReadKey();

}

// write data to file

private static String WriteFile(string data)

{

System.DateTime currentTime = System.DateTime.Now;

string strYearMonthDay = currentTime.AddDays(-1).ToString("yyyMMdd");

string fileName = "MyFileSend" + strYearMonthDay + ".txt";

string currentDir = System.AppDomain.CurrentDomain.BaseDirectory + @"SaveDir";

if (System.IO.Directory.Exists(currentDir))

{

System.IO.Directory.CreateDirectory(currentDir);

}

String filePath = currentDir + fileName;

System.IO.StreamWriter file = new System.IO.StreamWriter(filePath, false);

file.Write(data);

file.Close();

file.Dispose();

return filePath;

}

private static String ReadFile(String filePath)

{

string strData = "";

try

{

string line;

using (System.IO.StreamReader sr = new System.IO.StreamReader(filePath))

{

while ((line = sr.ReadLine()) != null)

{

strData = line;

}

}

}

catch (Exception e)

{

// show error info to customer

Console.WriteLine("The file could not be read:");

Console.WriteLine(e.Message);

}

return strData;

}

}

}