// @nuget: HtmlAgilityPack

​

using System;

using System.Xml;

using System.Diagnostics;

using HtmlAgilityPack;

using System.Linq;

using System.Linq.Expressions;

​

public class Program

{

    public static void Main()

    {

        // Test 1

        {

            HtmlDocument document = new HtmlDocument();

            document.LoadHtml("<constituent></constituent" + 0xa0 + ">note in the end tag before this sentence, char 0xA0, not 0x20, is appended<constituent></constituent>");

​

            var html = document.DocumentNode.InnerHtml;

​

            Console.WriteLine(html);        

        }

        // Test 2

        {

            HtmlDocument document = new HtmlDocument();

            document.LoadHtml("<constituent></constituent >note in the end tag before this sentence, char 0xA0, not 0x20, is appended<constituent></constituent>");

​

            var html = document.DocumentNode.InnerHtml;

​

            Console.WriteLine(html);        

        }

    // Test 3

        {

            Console.WriteLine("Test 3:");

            var tex ="<c></c\u00a0><c></c>";

            Console.WriteLine(tex);

            //throw new Exception(); /// conform how exception thrown results  in UI; so we can make sure the following exceptions are observable;

            if(tex.Length!= 3+5+3+4){ throw new Exception();}   

            if(tex[6] != 0xa0){ throw new Exception();}

            if(tex[7] != '>'){ throw new Exception();}  

            HtmlDocument document = new HtmlDocument();

            document.LoadHtml(tex);

            var html = document.DocumentNode.InnerHtml;

            Console.WriteLine("doc innerHtml: ");           

            Console.WriteLine(html);

            Console.WriteLine("doc innerText: ");           

            Console.WriteLine(document.DocumentNode.InnerText);

            var els =document.DocumentNode.ChildNodes.Where(n=>n.NodeType==HtmlAgilityPack.HtmlNodeType.Element).ToArray();

            if(els.Length !=2) throw new Exception("els.count shall be 2;");

        }           

        // Test 4

        {

            Console.WriteLine("Test 4 for element 'a':");

            var tex ="<a></a\u00a0><a></a>";

            Console.WriteLine(tex);

            //throw new Exception(); /// conform how exception thrown results  in UI; so we can make sure the following exceptions are observable;

            if(tex.Length!= 3+5+3+4){ throw new Exception();}   

            if(tex[6] != 0xa0){ throw new Exception();}

            if(tex[7] != '>'){ throw new Exception();}  

            HtmlDocument document = new HtmlDocument();

            document.LoadHtml(tex);

            var html = document.DocumentNode.InnerHtml;

            Console.WriteLine("doc innerHtml: ");

            Console.WriteLine(html);

            Console.WriteLine("doc innerText: ");           

            Console.WriteLine(document.DocumentNode.InnerText);

            var els =document.DocumentNode.ChildNodes.Where(n=>n.NodeType==HtmlAgilityPack.HtmlNodeType.Element).ToArray();

            if(els.Length !=2) throw new Exception("els.count shall be 2;");

        }       

    }

}