LINQ Find Null Objects in List

Question

I have a List<MyList> of objects.

MyList also has in it several Lists and one might be called List<Defect>.

List<Defect> can contain multiple defects one or more of which might be null.

How can I return a count of MyList items where MyList.Defects contains a null object?

I know I can do a foreach and check every item but is there a LINQ way to do this?

Answer 1

How can I return a count of MyList items where MyList.Defects contains a null object?

return myLists.Count(ml => ml.Defects.Contains(null));

Answer 2

return myLists.Count(ml => ml.Defects.Any(d => d==null));