Convert Linq ObjectQuery IQueryable to IEnumerable -

totally confused data types required here.

i have linq statement:

                var feat = allcustomers                     .select(c => c.customerservices.selectmany(cs => cs.customerservicefeatures)                     .selectmany(csf => csf.configelements).where(ce => ce.name == "itemtype").select(ce => ce.value).distinct()); 

it returns required data, , vs tells me type being set as:

system.data.objects.objectquery<system.collections.generic.ienumerable<string>> 

however want add data list of strings:

 list<string> itemtypes = new list<string>();  itemtypes.addrange(feat); 

but throws error:

 argument 1: cannot convert 'system.linq.iqueryable<system.collections.generic.ienumerable<string>>' 'system.collections.generic.ienumerable<string>'    

i can't find required syntax cast correct type. can help?

cheers, matt

compile-time error shows, feat "collection of collection of string" (literally "iqueryable of ienumerable of string"). need generate flat collection.

feat.selectmany(x => x)