title: Regular Expression won't show up as complete string in C#
body: <p>I'm trying to use <a href="http://www.regexlib.com/RETester.aspx?regexp_id=1121" rel="nofollow">this regular expression</a> in my application, but for some reason C# won't accept it as a complete string.</p>
  
  <p>If I'm not mistaken, it has to do with a couple of double quotes in the expression, but it looks to me like they're escaped.</p>
  
  <p>Here's the RegEx:</p>
  
  <p><code>^((([hH][tT][tT][pP][sS]?|[fF][tT][pP])\:\/\/)?([\w\.\-]+(\:[\w\.\&amp;%\$\-]+)*@)?((([^\s\(\)\&lt;\&gt;\\\"\.\[\]\,@;:]+)(\.[^\s\(\)\&lt;\&gt;\\\"\.\[\]\,@;:]+)*(\.[a-zA-Z]{2,4}))|((([01]?\d{1,2}|2[0-4]\d|25[0-5])\.){3}([01]?\d{1,2}|2[0-4]\d|25[0-5])))(\b\:(6553[0-5]|655[0-2]\d|65[0-4]\d{2}|6[0-4]\d{3}|[1-5]\d{4}|[1-9]\d{0,3}|0)\b)?((\/[^\/][\w\.\,\?\'\\\/\+&amp;%\$#\=~_\-@]*)*[^\.\,\?\"\'\(\)\[\]!;&lt;&gt;{}\s\x7F-\xFF])?)$</code></p>
  
  <p>And here's how I'm trying to declare it:</p>
  
  <p><code>[RegularExpression(@"^((([hH][tT][tT][pP][sS]?|[fF][tT][pP])\:\/\/)?([\w\.\-]+(\:[\w\.\&amp;%\$\-]+)*@)?((([^\s\(\)\&lt;\&gt;\\\"\.\[\]\,@;:]+)(\.[^\s\(\)\&lt;\&gt;\\\"\.\[\]\,@;:]+)*(\.[a-zA-Z]{2,4}))|((([01]?\d{1,2}|2[0-4]\d|25[0-5])\.){3}([01]?\d{1,2}|2[0-4]\d|25[0-5])))(\b\:(6553[0-5]|655[0-2]\d|65[0-4]\d{2}|6[0-4]\d{3}|[1-5]\d{4}|[1-9]\d{0,3}|0)\b)?((\/[^\/][\w\.\,\?\'\\\/\+&amp;%\$#\=~_\-@]*)*[^\.\,\?\"\'\(\)\[\]!;&lt;&gt;{}\s\x7F-\xFF])?)$")]</code></p>
  
  <p>Sorry about the formatting, I cannot figure out how to display it best...</p>
  
  <p>To reiterate, C# does not recognize it as a string when placed in double quotes.</p>
  
  <p>How can I use this expression in C#? </p>