I have the following query:

var groupCats =
            from g in groups
            group g by g.Value into grouped
            select new
            {
                GroupCategory = grouped.Key,
                Categories = GetCategories(grouped.Key, child)
            };

This works fine. In the anonymous type returned GroupCategory is a string, and Categories are an Enumerable - what is the proper way to declare this instead of using 'var'?

I tried:

IGrouping<string,string> groupCats =
            from g in groups
            group g by g.Value into grouped
            select new
            {
                GroupCategory = grouped.Key,
                Categories = GetCategories(grouped.Key, child)
            };

and

IGrouping<string,Enumerable<string>> groupCats =
            from g in groups
            group g by g.Value into grouped
            select new
            {
                GroupCategory = grouped.Key,
                Categories = GetCategories(grouped.Key, child)
            };

In both instances I get:

Cannot implicity convert type....An explicit conversion exists (are you missing a cast)

How do I cast this?