Line Numbers

/* Write a program that reads a text file and inserts line numbers in front of each of its lines. The result should be written to another text file. Use StreamReader in combination with StreamWriter. */

namespace _02.Line_Numbers
{
    using System.IO;
    using System.Text;

    class LineNumbers
    {
        static void Main(string[] args)
        {
            using (var reader = new StreamReader("../../LineNumbers.cs"))
            {
                using (var stream = new FileStream("../../NumberedLines.txt", FileMode.Create))
                {
                    using (var writer = new StreamWriter(stream, Encoding.ASCII, 4096))
                    {
                        string textLine = reader.ReadLine();
                        int lineNum = 0;
                        while (textLine != null)
                        {
                            lineNum++;
                            writer.WriteLine("#{0,2} {1}", lineNum, textLine);
                            textLine = reader.ReadLine();
                        }
                    }
                }
            }
        }
    }
}