File is being used by another process

Question

I have a program that roughly does this:

1. open a file to read from it.
2. close the file
3. Start a filewatcher to watch for changes in the file.

Answer 1

Note: even if "file.txt" is open in Notepad, this code still works, because it is opening for read.

using System;
using System.IO;

class Program
{
  static void Main(string[] args)
  {
    ReadFromFile(@"C:\file.txt");
    Console.ReadLine();
  }

  static void ReadFromFile(string filename)
  {
    string line;
    using (StreamReader sr = File.OpenText(filename))
    {
      line  = sr.ReadLine();
      while (line != null)
      {
        Console.WriteLine(str);
        line = sr.ReadLine();
      }
      sr.Close();
    }
  }
}

---

Or just:

string text = System.IO.File.ReadAllText(@"C:\file.txt");