using System;

using System.Linq;

using HtmlAgilityPack;

public class Program

{

    public static void Main()

    {

        string html = @"<div _ngcontent-bxt-c141="""" xlcell=""6"" data-header=""Bonus"" class=""ts-table-row-item xlformatNumber"">

                            <span _ngcontent-bxt-c141="""" class=""ts-num"">9,000.00</span>

                        </div>";

        var doc = new HtmlDocument();

        doc.LoadHtml(html);

​

        var value = doc.DocumentNode.SelectNodes("//span[@class='ts-num']").First();

​

        Console.WriteLine(value.InnerText);

    }

}