static void Main(string[] args)
{
    var client = new System.Net.WebClient();
    client.Encoding = System.Text.Encoding.UTF8;
    var document = new HtmlAgilityPack.HtmlDocument();
    document.LoadHtml(client.DownloadString("http://albertein.gamersla.net"));
 
    foreach (HtmlAgilityPack.HtmlNode node in 
        document.DocumentNode.SelectNodes("//a[@class='title']"))
            Console.WriteLine(node.InnerHtml);
}

static void Main(string[] args)
{
    var url = "http://diccionario.babylon.com/Humanidades/Mitolog%C3%ADa/A/1/";
    var client = new System.Net.WebClient();
    client.Encoding = System.Text.Encoding.UTF8;
    var document = new HtmlAgilityPack.HtmlDocument();
    document.LoadHtml(client.DownloadString(url));
 
    foreach (HtmlAgilityPack.HtmlNode node in
        document.DocumentNode.SelectNodes("//a[@class='words']"))
            Console.WriteLine(node.InnerHtml);
}

static void Main(string[] args)
{
    var url = "http://www.penny-arcade.com/comic/1998/11/18/";
    var baseUrl = "http://www.penny-arcade.com";
    bool lastStrip = false;
    var client = new System.Net.WebClient();
    client.Encoding = System.Text.Encoding.UTF8;
 
    while (!lastStrip)
    {
        var document = new HtmlAgilityPack.HtmlDocument();
        document.LoadHtml(client.DownloadString(url));
 
        var imageQuery = "/html/body/div[2]/div[3]/div/div[2]/img";
        var nextButtonQuery = "/html/body/div[2]/div[3]/div/div[3]/a[4]";
 
        var imageUrl = document.DocumentNode.
            SelectSingleNode(imageQuery).Attributes["src"].Value;
 
        //Aquí iria el codigo para descargar la imagen que se encuentra en
        //baseUrl + imageUrl
 
        //Obtenemos la dirección del próximo comic
 
        url = baseUrl + document.DocumentNode.
            SelectSingleNode (nextButtonQuery).Attributes ["href"].Value; 
 
        lastStrip = url == baseUrl; // Llegamos al ultimo comic?
    }
}