How to get the Link or IerText using HTMLAgilityPack

I have this structure:

<p class="info">Sample：
    <strong>
       <a href="http://PleaseGetMe.com" target="_blank">http://PleaseGetMe.com</a>
    </strong> 
</p>

What I want is to get the http://PleaseGetMe.com

Here is what I'm trying:

                var a = doc.SelectNodes("//*[@class='info']//a");
                Console.WriteLine(a);

Which is not successful.