How can i use Extension Methods in boo

问题:

I have a list in my boo script and want to use System.Linq Extension Methods but boo compiler throw this Exception:

BCE0019: Boo.Lang.Compiler.CompilerError: 'ToList' is not a member of 
'System.Linq.IQueryable`1[[...]]'.

("..." is type of my object)

回答1:

What version of Boo? Extension Methods have been supported since 0.9.0. If you can't use extension methods with the version you are using, you'll have to use absolute method calls, e.g. Enumerable.Select(...).

As @Jean has said, have you also imported System.Linq?

回答2:

I should import System.Linq.Enumerable not System.Linq

thanks Jean and Matthew for your answers.