title: Changing html with Regex in C#
body: <p>I've got source string like</p>
  
  <pre><code>&lt;p&gt;blablabla&lt;/p&gt;
  &lt;p&gt;&lt;img style="float: left;" src="../Content/attachments/455dd178-db28-4856-85e8-c65c8e6b04df_312540909.jpg" alt="455dd178-db28-4856-85e8-c65c8e6b04df_312540909.jpg" /&gt;blablabla&lt;/p&gt;
  &lt;p&gt;&lt;img style="float: right;" src="../Content/attachments/dec0f850-2921-4bf7-87b8-d2410e04a841_image001.gif" alt="dec0f850-2921-4bf7-87b8-d2410e04a841_image001.gif" width="100" /&gt;&lt;/p&gt;
  </code></pre>
  
  <p>For each img element I need to remove alt attribute, and replace src elements with srcFileName.Substring(37).</p>
  
  <p>Can't figure out the regex needed. Please help.</p>