title: Meta tag invalid property attribute
body: <p>I'm trying to change the default thumbnail pic facebook uses when I post my website url on fb. Now I've been on a couple of websites/forums and there is a lot of confusion/differences about it.
  Most people say that you should include the following line in the <code>&lt;head&gt;&lt;/head&gt;</code> tag of your homepage:</p>
  
  <pre><code>&lt;link rel="image_src" href="url to your desired thumbnail image.jpg" /&gt;
  </code></pre>
  
  <p>Now I did that (and so did many other people) and it doesn't work(for others as well). Some other folks on different websites suggested including the following:</p>
  
  <pre><code>&lt;meta name="fb" content="url to your desired thumbnail image.jpg" property="og:image"/&gt;
  </code></pre>
  
  <p><strong>In ASP.NET (visual studio '10) it says that <code>'property'</code> is not a valid attribute of 'meta'</strong>.</p>
  
  <p>Now what schemas should I declare in my html tags for property to be a 'valid' attribute. I went on some big websites to see their coding, and found the following meta tags declared in the <code>&lt;head&gt;</code> tag:</p>
  
  <pre><code>&lt;meta content="IE=100" http-equiv="X-UA-Compatible"&gt;
  &lt;meta content="text/html; charset=utf-8" http-equiv="Content-Type"&gt;
  </code></pre>
  
  <p>I tried that as well but fb still doesn't use the pic I specified to be used as the thumbnail. My coding and url's are not broken or anything, visual studio debugs it without problems.</p>
  
  <p>Please help...</p>
  
  <p>Thank You</p>