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

var nonmanagers = employees.Select(e => e.Id)
    .Except(managers.Select(m => m.EmployeeId))
    .Select(id => employees.Single(e => e.Id == id));