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    <p>Here are 2 approaches using LINQ to XML and regex. Although some people frown upon parsing HTML with regex, this particular case doesn't have nested elements so it is a reasonable solution. LINQ to XML would only work if your HTML is well-formed. Otherwise take a look at the <a href="http://www.codeplex.com/htmlagilitypack" rel="nofollow noreferrer">HTML Agility Pack</a>.</p> <p><strong>EDIT:</strong> for your sample <code>Elements()</code> works with LINQ to XML. However, if you have many nested HTML tags then you may want to use <code>Descendants()</code> to reach all desired tags.</p> <pre><code>string input = @"&lt;p&gt;This is some html text. my favourite website is &lt;a href=""http://www.google.com""&gt;google&lt;/a&gt; and my favourite help site is &lt;a href=""http://www.stackoverflow.com""&gt;stackoverflow&lt;/a&gt; and i check my email at &lt;a href=""http://www.gmail.com""&gt;gmail&lt;/a&gt;. the url to my site is http://www.mysite.com. &lt;img src=""http://www.someserver.com/someimage.jpg"" alt=""""/&gt;&lt;/p&gt;"; var xml = XElement.Parse(input); var result = xml.Elements() .Where(e =&gt; e.Name == "img" || e.Name == "a") .Select(e =&gt; e.Name == "img" ? e.Attribute("src").Value : e.Attribute("href").Value); foreach (string item in result) { Console.WriteLine(item); } string pattern = @"&lt;(?:a|img).+?(?:href|src)=""(?&lt;Url&gt;.+?)"".*?&gt;"; foreach (Match m in Regex.Matches(input, pattern)) { Console.WriteLine(m.Groups["Url"].Value); } </code></pre> <p><strong>EDIT #2:</strong> in response to your update about RegexBuddy, I wanted to point out the tool I use. <a href="http://www.ultrapico.com/Expresso.htm" rel="nofollow noreferrer">Expresso</a> is a good free tool (email registration only, but it's free). The author also wrote <a href="http://www.codeproject.com/KB/dotnet/regextutorial.aspx" rel="nofollow noreferrer">The 30 Minute Regex Tutorial</a> which you can use to follow along and is included in the help file of Expresso.</p>
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