StreamReader reads text files. It is found in the System.IO namespace. We have to wrap the FileStream object into StreamReader and use their methods to manipulate files, but limitation with this is that random access of file is not supported.

Example

using System;
using System.IO;
namespace StreamReaderConsoleApplication
{
    class streamReaderExample
    {
        static void Main(string[] args)
        {
            string str;
            try
            {
                FileStream fs = new FileStream(@"D:\SumitKesarwani\sumit\2013-5-11\StreamReaderConsoleApplication\data.txt", FileMode.Open);
                StreamReader sr = new StreamReader(fs);
                str = sr.ReadLine();
                while (str != null)
                {
                    Console.WriteLine(str);
                    str = sr.ReadLine();
                }
                sr.Close();
            }
            catch(IOException e)
            {
                Console.WriteLine("Exception occured" + e.ToString());
            }
            Console.ReadLine();
        }
    }
}

 Output