LINQ Find null objects in a list

Question

I have a List<MyList> objects.

MyList also has several lists in it and can be called List<Defect> .

List<Defect> may contain several defects, one or more of which may be empty.

How to return the number of MyList elements, where MyList.Defects contains a null object?

I know I can do foreach and check every element, but is there a LINQ way for this?

Answer 1

How to return the number of MyList elements, 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));