streamreader error

Hi expert,

I have a text file whose content I check is ok; but I could not read this file. Also
I check nobody uses this file in my Pc.
Coud you give me a hand?

Thx,
JT

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
 
namespace streamreader
{
    class Program
    {
        static void Main(string[] args)
        {
            try
            {
                FileStream fs = new FileStream(@"c:\ratetable\Carriername.txt", FileMode.OpenOrCreate, FileAccess.ReadWrite);
                //FileStream fs = new FileStream("c:\\ratetable\\carrierinfo.txt", FileMode.OpenOrCreate, FileAccess.ReadWrite);
                using (StreamReader sr = new StreamReader(fs))
 
                {
                    string strLine = null;
                    while ((strLine = sr.ReadLine()) != null)
                    {
                        Console.WriteLine(strLine);
                    }
                    sr.Close();
                    return;
                }
            }
            catch (IOException err)
            {
                Console.WriteLine("An IO exception has been thrown!");
                Console.WriteLine(err.ToString());
                return;
            }
        }
        
    }
}

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carriername.txt.txt