title: How do I add a system.core.dll reference to my project in xamarin studio/monodevelop
body: <p>I'm trying to use <code>System.Linq</code> because it has an 'Unknown resolve error'. I've done a bit of looking around on how to do this and all I can find is people saying that it needs to be added or that they added it. I'm wondering how to add it to my project so that I can use the '.ToList' function.</p>