Regular Expression

I can't imagine why you'd want to do this using RE when you can just use string.Length but the following code should count all characters (including '\n') in a given string:

using System;
using System.Text.RegularExpressions;

class Program
{

     static void Main()
     {
        string s = "The quick brown fox jumped over the lazy dog. 7#\r\n";
        Regex r = new Regex (".|\n"); // '.' matches any character except '\n'
        MatchCollection mc = r.Matches(s);
        Console.WriteLine(mc.Count); // 50
        Console.ReadLine();
     }
}