title: Help with a .net regex
body: <ol>
  <li>var a = @"Blah &lt;a href=""{0}""&gt;blah&lt;/a&gt;"
  <li>if ( b == "")
  <li>if (c =="")
  <li>var d = ""
  <li>var e=""
  </ol>
  
  <p>Looking for a .Net regex that will match lines 2 - 5, but not 1. The input is each line. Bascially I am tying to distinguish between A. using "" in a @ prefixed string literal and B. using "" where string.Empty would be better.
  <br/>
  <code>=\s*""</code> is my start, but it matches all 5 lines. How can I modify it to not match 1, but match the others? Modify it in someway to incorporate ^@?</p>