using System;

using System.Xml; // required so System.Xml library is referenced and used by HAP

using System.Text.RegularExpressions;

using HtmlAgilityPack;

public class Program

{

    private static readonly Regex multiLF = new Regex(@"\n{3,}", RegexOptions.Compiled | RegexOptions.Singleline);

    public static void Main()

    {

        var web = new HtmlWeb();

        var doc = web.Load("http://stackoverflow.com/questions/30926684/truncating-html-content-at-the-end-of-text-blocks-block-elements");

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

        string questionText = multiLF.Replace(question.InnerText.Trim(), "\n\n");

        Console.WriteLine("\n-- FULL QUESTION TEXT ------------------------------------------\n");

        Console.WriteLine(questionText);

​

        string truncatedText = questionText.Substring(0, 1250);

        truncatedText += "|MAX|";

        truncatedText = truncatedText.Insert(1000, "|LIMIT|");

        truncatedText = truncatedText.Insert(750, "|MIN|");

        Console.WriteLine("\n-- FIRST 1250 CHARACTERS ---------------------------------------\n");

        Console.WriteLine(truncatedText);

    }

​

}