Scraper for http://meta.codereview.stackexchange.com/q/1042/2041

Program.cs

using System;
using System.Collections.Generic;
using System.Linq;
using HtmlAgilityPack;

namespace nuget_tmp
{
    static class Program
    {
        private static void Main()
        {
            var questionsUnsnaswered = GetQuestions("http://codereview.stackexchange.com/questions?page={0}&sort=unanswered&pagesize=50").ToList();
            var unansweredVotes = GetQuestions("http://codereview.stackexchange.com/unanswered/tagged/?page={0}&tab=votes&pagesize=50").ToList();

            Console.WriteLine("QU: {0}", questionsUnsnaswered.Count);
            Console.WriteLine("UV: {0}", unansweredVotes.Count);

            Console.WriteLine("QU.D: {0}", questionsUnsnaswered.Distinct().Count());
            Console.WriteLine("UV.D: {0}", unansweredVotes.Distinct().Count());


            Console.WriteLine();

            var firstExceptSecond = questionsUnsnaswered.Except(unansweredVotes).ToList();
            var secondExceptFirst = unansweredVotes.Except(questionsUnsnaswered).ToList();

            Console.WriteLine("QU \\ UV: {0}", firstExceptSecond.Count);
            foreach (var question in firstExceptSecond)
            {
                Console.WriteLine(question);
            }

            Console.WriteLine();

            Console.WriteLine("UV \\ QU: {0}", secondExceptFirst.Count);
            foreach (var question in secondExceptFirst)
            {
                Console.WriteLine(question);
            }        
        }

        private static IEnumerable<Question> GetQuestions(string urlTemplate)
        {
            var htmlWeb = new HtmlWeb();
            htmlWeb.UserAgent = "Svick's scraper for http://meta.codereview.stackexchange.com/q/1042/2041";

            for (int i = 1; i <= 20; i++)
            {
                string url = string.Format(urlTemplate, i);

                var document = htmlWeb.Load(url);

                var nodes = document.DocumentNode.SelectNodes("//a[@class='question-hyperlink']");

                var questionUrls = nodes.Select(n => n.GetAttributeValue("href", null));

                foreach (var questionUrl in questionUrls)
                {
                    yield return new Question(questionUrl, i);
                }
            }
        }
    }

    sealed class Question : IEquatable<Question>
    {
        public bool Equals(Question other)
        {
            if (ReferenceEquals(null, other))
                return false;
            if (ReferenceEquals(this, other))
                return true;
            return string.Equals(Url, other.Url);
        }

        public override bool Equals(object obj)
        {
            return Equals(obj as Question);
        }

        public override int GetHashCode()
        {
            return Url.GetHashCode();
        }

        public Question(string url, int page)
        {
            Url = url;
            Page = page;
        }

        public string Url { get; private set; }
        public int Page { get; private set; }

        public override string ToString()
        {
            return string.Format("{0}; {1}", Url, Page);
        }
    }
}