using System;

using System.IO;

using System.Diagnostics;

using System.Text;

//using static System.IO.Directory;

//using static System.IO.Path;

//using static System.Environment;

public class Program

{

    public static void Main()

    {

        var fileName = "filename.txt";

        // CREATE a file in your Sandbox using .NET Fiddle 

        WriteFile(fileName);

        // READ an existing file in your Sandbox using .NET Fiddle

        ReadAllText(fileName);

        ReadAllText(fileName);

        ReadAllText(fileName);

        //TimerTest();

        //Console.WriteLine(BuildString(BuildString("0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789")).Length);

    }

    private static Stopwatch sw = new Stopwatch();

    public static String BuildString(String baseStr){

        StringBuilder strBldr = new StringBuilder();

        for (int i = 0; i < 100; i++)

        {   

            strBldr.Append(baseStr);

        }

        return strBldr.ToString();

    }

    public static void WriteFile(string textFile)

    {

        sw.Restart();

        //MemoryStream textWriter = File.Create(textFile);

        FileStream textWriter = new FileStream(textFile, FileMode.Create);

        byte[] info = new UTF8Encoding(true).GetBytes(BuildString(BuildString("01234567890123456789012345678901234567890123456789")));

        textWriter.Write(info, 0, info.Length);

        //textWriter.Write(BuildString(BuildString("01234567890123456789012345678901234567890123456789")));

        textWriter.Close();

        Console.WriteLine("Write Time " + sw.Elapsed);

    }

    public static void ReadAllText(string textFile)

    {

        sw.Restart();

        StreamReader textReader = File.OpenText(textFile);

        //Console.WriteLine(textReader.ReadToEnd());

        //Console.WriteLine(textReader.ReadToEnd().Length);

        textReader.ReadToEnd();

        Console.WriteLine("Read Time  " + sw.Elapsed);

    }

    public static void TimerTest(){

        sw.Start();

        System.Threading.Thread.Sleep(1000);

        Console.WriteLine(sw.Elapsed);

    }

}