My try to make Linq works on Boo

LinqInBoo.boo

#
# IMPORTANT:
# Unfortunately this code does not work, and I am trying to figure out why
#

#
# Asking politely for Linq to show up
#
import System.Linq from "C:\\Program Files (x86)\\Reference Assemblies\\Microsoft\\Framework\\v3.5\\System.Core.dll"

#
# This figures out if the number is even or odd
#
Even = { x | (x % 2) == 0 }

#
# Our little piece of data
#
values = (1, 2, 3, 4, 5, 6, 7, 8, 9)

# Must count 5 odds
assert 5 == values.Where({ x | not Even(x)}).Count()

# Must count 4 evens
assert 4 == values.Where({ x | Even(x)}).Count()