Using LINQ to Objects to find items in one collection that do not match another

Question

I want to find all items in one collection that do not match another collection. The collections are not of the same type, though; I want to write a lambda expression to spe

Answer 1

This is almost the same as some other examples but less code:

employees.Except(employees.Join(managers, e => e.Id, m => m.EmployeeId, (e, m) => e));

It's not any simpler than employees.Where(e => !managers.Any(m => m.EmployeeId == e.Id)) or your original syntax, however.