using System;
using System.IO;
class FileIo
{
    static void Main(string[] args)
    {
        string filename = "C:\\Users\\DO IT\\Desktop\\HTML\\noco.txt";
        File.WriteAllText(filename, "hello world");

        string content = File.ReadAllText(filename);
        Console.WriteLine("file content");
        Console.WriteLine(content);
    }
}