Question

I was expecting the following LINQ query to retrieve all contacts with the specified phone number but instead it returns all contacts that don’t have a phone number at all.

var query = from contact in dc.Contacts             where contact.Phones.All(phone => phone.PhoneNumber == '5558675309')             select contact; 

What am I doing wrong here?

Answer 1

I should have been using the Any extension method, not All.

The following code works just fine:

var query = from contact in dc.Contacts                         where contact.Phones.Any(p => p.PhoneNumber == '5558675309')                         select contact;