C# - HRTL-Wrapper für Websites

using System;
using System.Collections.Generic;
using System.Net;
using System.Web;

class HLRT_Wrapper
{
    WebClient webClient;
    public HLRT_Wrapper()
    {
        webClient = new WebClient();
    }

    public List<List<String>> parseWebsite(string address, string head, string tail, params Element[] elemente)
    {
        List<List<String>> result = new List<List<String>>();
            
        string source = HttpUtility.HtmlDecode(webClient.DownloadString(address));

        int leftIndex = source.IndexOf(head);
        int rightIndex = source.IndexOf(head);
        while (true)
        {
            for (int i = 0; i < elemente.Length; i++)
            {
                leftIndex = source.IndexOf(elemente[i].left, rightIndex + 1);
                rightIndex = source.IndexOf(elemente[i].right, leftIndex + 1);

                if (rightIndex > source.IndexOf(tail) || leftIndex == -1 || rightIndex == -1)
                    return result;

                string text = source.Substring(leftIndex + elemente[i].leftDistance, rightIndex - leftIndex - elemente[i].leftDistance - elemente[i].rightDistance);

                if (result.Count < i + 1)
                    result.Add(new List<String>());
                result[i].Add(text);
            }
        }
    }

    public class Element
    {
        public string left { get; set; }
        public int leftDistance { get; set; }
        public string right { get; set; }
        public int rightDistance { get; set; }

        public Element(string left, int leftDistance, string right, int rightDistance)
        {
            this.left = left;
            this.leftDistance = leftDistance;
            this.right = right;
            this.rightDistance = rightDistance;
        }
    }
}

public void parseDotnetSnippets()
{
    HLRT_Wrapper wrapper = new HLRT_Wrapper();

    HLRT_Wrapper.Element sprache = new HLRT_Wrapper.Element("col1\">", 6, "<", 0);
    HLRT_Wrapper.Element autor = new HLRT_Wrapper.Element("col2\">", 6, "<", 0);
    HLRT_Wrapper.Element url = new HLRT_Wrapper.Element("<a href=", 9, "\">", 0);
    HLRT_Wrapper.Element titel = new HLRT_Wrapper.Element(">", 1, "</a>", 0);

    List<List<String>> liste = wrapper.parseWebsite("http://dotnet-snippets.de/", "col3\">Titel", "</table>", sprache, autor, url, titel);
            
    for (int j = 0; j < liste[0].Count; j++)
    {
        for (int i = 0; i < liste.Count; i++)
            Console.Write(liste[i][j] + "\t");
        Console.WriteLine();
    }
}

public void parseWDR2()
{
    HLRT_Wrapper wrapper = new HLRT_Wrapper();

    HLRT_Wrapper.Element interpret = new HLRT_Wrapper.Element("strong", 7, "<", 1);
    HLRT_Wrapper.Element titel = new HLRT_Wrapper.Element("/strong", 8, "<", 0);

    List<List<String>> liste = wrapper.parseWebsite("http://www.wdr2.de/", "colored", "class=\"live", interpret, titel);

    for (int j = 0; j < liste[0].Count; j++)
    {
        for (int i = 0; i < liste.Count; i++)
            Console.Write(liste[i][j] + "\t");
        Console.WriteLine();
    }
}