Dynamic LINQ

Hi!

I know there is way to build linq dynamicalli with Expression class and i was struggling for hours to make following code dynamic:

public IQueryable<T> OrderByGuid<T>(IQueryable<T> query, string fieldName) where T : Ii18n
        {
            switch (fieldName)
            {
                case "X":
                    return query.OrderBy(x => x.i18ns.SingleOrDefault(
y => y.LanguageID == CurrentLanguageID && y.ValueID == x.X).Value);
                /**
                .
                .
                .
                etc.
                **/
            }
            return null;
        }

The idea is that i have lists that contain language-dependent columns and when i order by that column, I want it to be ordered by the value of current language.

Regards
Max