title: How to verify signed XML file signature
body: <p>I have a file created using <a href="http://msdn.microsoft.com/en-us/library/system.security.cryptography.xml.signedxml.aspx" rel="nofollow noreferrer">SignedXml</a> class in "normal" .NET framework. It's signed using RSA algorithm.
  I'd like to check its signature using XDocument in a Windows RT application, what is the best way to do it? Port some crypto library or are there any other alternatives?</p>