Generic extension methods

cedric@laptop:~/dev/workspace/boo/boo$ cat tests/testcases/regression/BOO-994-1.boo 
"""
2
4
"""
import System.Collections.Generic
import System.Linq from System.Core

l = List[of int]()
l.Add(1)
l.Add(2)
doublel = l.Select[of int, int]({i as int|return i*2})

for n in doublel:
        print n

cedric@laptop:~/dev/workspace/boo/boo$ booc tests/testcases/regression/BOO-994-1.boo 
Boo Compiler version 0.8.1.2896 (CLR v2.0.50727.42)
tests/testcases/regression/BOO-994-1.boo(12,13): BCE0019: 'Select' is not a member of 'System.Collections.Generic.List`1[[System.Int32, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]]'. 
1 error(s).