Using system.xml.linq with Unity iOS

Hey everyone :)

I'm wondering if there is any way to use the system.xml.linq namespace with monotouch for iOS? (So I get access to the XDocument class functionality). When I include the assembly in MonoDevelop and add the namespace to the source code and compile I get no errors whatsoever, but as soon as I get out into the Unity editor the console displays t$$anonymous$$s error:

error CS0234 : The type or namespace name 'Linq' Does not exist in the namespace 'System.Xml'. Are you missing an assembly reference.

Any ideas about why t$$anonymous$$s happens? And if there is any possible way to use the system.xm.linq library with Unity.

For anyone curious, these are the details of my system and unity:

• Mac OS X 10.7.4

• Unity 3.5.6f4

• MonoDevelop-Unity 2.8.2

Thank you for your time :)