mono/mono — pull request #415 by enricosada (2012-08-04 18:21:59+00:00)
Title: Use HashSet.Comparer for set methods with IEnumerable collection

fix bug 6373 ( https://bugzilla.xamarin.com/show_bug.cgi?id=6373 )

i checked the behaviour with .NET 3.5, .NET 4.0