using System.Text.RegularExpressions;

//looking for photo paths with REGX-a
        string nl = // in this case page html.
        MatchCollection mc = null;
        string sRegExp = "src=(?:\"|\')?(?<imgSrc>[^>]*[^/].(?:jpg|bmp|gif|png))(?:\"|\')?";
        mc = Regex.Matches(nl, sRegExp);

        string[] path;
        for (int j = 0; j < mc.Count; j++)
        {
            path = mc[j].Value.Split('"');
            Response.Write(path[1].ToString().Trim() + "<br />");
        }

In this case I'm looking for image sources in html and placing them in array.

Parse html via RegularExpression and place results in Array

path, array

C#