anagram c# tester

anagram.cs

using System;
using System.Linq;
using System.Collections.Generic;
using System.Text;
namespace ConsoleApplication1
{
    class Program
    {
        static bool IsAnagram(string word1, string word2) {
            if (word1.Length != word2.Length) {
                return false;
            }
            var dict1 = CountChars(word1);
            var dict2 = CountChars(word2);

            return dict1.Count == dict2.Count &&
                Array.TrueForAll(dict1.Keys.ToArray(),
                    k => dict2.ContainsKey(k) && (dict1[k] == dict2[k]));
        }

        static Dictionary<char, int> CountChars(string word) {
            var dict = new Dictionary<char, int>();
            foreach (var k in word.ToCharArray()) {
                dict[k] = dict.ContainsKey(k) ? dict[k] + 1 : 1;
            }
            return dict;
        }

        static void Main(string[] args)
        {
            var cargs = Environment.GetCommandLineArgs();
            if (cargs.Length < 3) {
                Console.WriteLine("Not enough arguments!");
                Environment.Exit(1);
            }
            Console.WriteLine(IsAnagram(cargs[1], cargs[2]));
        }
    }
}