Linq: List of lists to a long list

Question

I\'ve got an object of type A which consists of a list of objects of type B:

class A { list Alist;}
class B { string C; st         


        

Answer 1

I too would have had a similar answer, my only modification was to add the where clause to avoid having empty strings (where C is empty):

listOfA.SelectMany( a => a.AList, (a, b) => b.C ).Where( c => c.Length > 0 );

Answer 2

ybo's answer would have been my first response too. The query expression equivalent of this is:

var query = from a in computeAList()
            from b in a.Alist
            select b.C;

For the sake of completeness, the other answers in this thread are variations on the same theme.

From ybo (the exact same query, expressed as dot notation):

var query = listOfA.SelectMany(a => a.Alist, (a, b) => b.C);

From Ray Hayes (including the Where clause; I've reformatted slightly):

var query = listOfA.SelectMany(a => a.AList, (a, b) => b.C)
                   .Where(c => c.Length > 0);