How to read a file in C# .Net

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;

namespace file
{
    class Program
    {
        static void Main(string[] args)
        {
            string path = "my_text.txt";
 StreamReader r = new StreamReader(path);
            string s = r.ReadToEnd();
            foreach (var item in s)
            {
                Console.Write(item);


           }
// 2nd Way to read a file


            string str ="";
            while ((str = r.ReadLine())!=null)
                  {
                      Console.WriteLine(str);
           
           
            }
}
}
}