Question

I’d like to return an object with the following signature

class AnonClass{     string Name {get;}     IEnumerable<Group> Groups {get;} } 

I have tried the following query, but g only returns a single entity, not all the joined entities

var q = from t in dc.Themes join g in dc.Groups on t.K equals g.ThemeK  select new {t.Name, Groups = g}; return q.ToArray(); 

but this returns

class AnonClass{    string Name {get;}    Group Groups{get;} } 

What is the correct linq query to use?

Answer 1

I think you want ‘join into’ instead of just ‘join’:

var q = from t in dc.Themes         join g in dc.Groups on t.K equals g.ThemeK into groups         select new { t.Name, Groups=groups }; 

(That’s completely untested, however – worth a try, but please verify carefully!)