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?

mqp · Accepted Answer · 2010-06-24 04:12:42Z

4

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

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

answered Jun 24, 2010 at 4:12

mqp

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Comments

Joel Coehoorn · Accepted Answer · 2010-06-24 04:14:56Z

4

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

answered Jun 24, 2010 at 4:14

Joel Coehoorn

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+1 Whilst I think this solution is probably easier to read, I like @mquander's solution a little better for its brevity. Thank you any way @Joel.