asp.net mvc - Use LINQ to Access All the Collections of a Collection on My Model? -

i trying write property on model, accessor can return collection comprised of collections each member of collection property contains.

so:

document.lines collection of line objects. each line has many many relationship documents called relateddocuments. able access collection of relateddocuments every line in document. there way in linq/ef?

i trying without creating dbcontext object in model.

long form this:

  public list<relateddocument> relateddocuments         {                         {                 var rds = new list<relateddocument>();                 foreach (var line in lines)                 {                     foreach (var rd in line.relateddocuments)                     {                         if (!rds.contains(rd))                         {                             rds.add(rd);                         }                     }                 }                 return rds;             }         } 

i'm not quite sure issue is; if lines ienumerable<t> (and using system.linq), wouldn't like

var allrelated = lines   .selectmany(line => line.relateddocuments)   .distinct(); 

suffice?

of course, lines has come somewhere ..