WinRT: 'where' not found when parsing XML

Question

I am trying to parse some simple XML like this:

XElement thisLevel = from l in xmlElements.Descendants("Level")
                        where l.Element("LevelNum") == thisLevel
                        select l;

But I get an error on "levels" saying:

Could not find an implementation of the query pattern for source type 'System.Collections.Generic.IEnumerable'. 'Where' not found. Are you missing a reference or a using directive for 'System.Linq'?

Strangely I can grab descendents:

var levels = xmlElements.Descendants("Level");

That works, but I can't seem to where on it.

Answer 1

As ChrisF mentioned, these using statements are both required:

using System.Xml.Linq;
using System.Linq; // this one was missing

I had thought System.Xml.Linq would cover all everything linq-related.

Thanks, ChrisF!