using System;

using System.Linq;

using System.Xml;

using HtmlAgilityPack;

public class Program

{

    public static void Main()

    {

        var html = new HtmlWeb()

            .Load("http://stackoverflow.com/questions/30926684")

            .DocumentNode

            .SelectSingleNode("//td[@class='postcell']//div[@class='post-text']");

        Console.WriteLine(html.InnerHtml);

        Console.WriteLine("\n********************************************************\n");

        //Truncate(html,200);

        Console.WriteLine(Truncate(html, 1000));

    }

    private static void RemoveEmpty(HtmlNode node)

    {

        var parent = node.ParentNode;

        node.Remove();

        if(parent==null) return;

        // remove parent if it is empty

        if(!parent.Descendants().Any())

        {

            //Console.WriteLine("->" + parent.Name);

            RemoveEmpty(parent);

        }

    }

    private static string Truncate(HtmlNode root, int limit)

    {

        var currentLength = 0;

        foreach(var node in root.Descendants().OfType<HtmlTextNode>().ToArray())

        {

            int length = node.Text.Length;

            //Console.WriteLine("[TEXT] \"{0}\"", node.Text);

            //Console.WriteLine("[NODE] length: {0} [DELTA] old: {1} new {2} ", length, oldDelta, newDelta);

            // if we're crossing limit

            if (currentLength > limit)

            {

                //Console.WriteLine("Removing " + node.Text);

                RemoveEmpty(node);

            }

            //else

            {

                currentLength += length;

            }

        }

        return root.CloneNode(true).InnerHtml;

    }

}