Can I use Linq's Except() with a lambda expression comparer?

Question

I know I can call linq\'s Except and specify a custom IEqualityComparer, but implementing a new Comparer class for each data type seems like an overkill for this purpose. Ca

Answer 1

Can you not use a .Where with a lambda that filters out your required values?

Example as requested:

    static void Main(string[] args)
    {
        var firstCustomers = new[] { new Customer { Id = 1, Name = "Bob" }, new Customer { Id = 2, Name = "Steve" } };
        var secondCustomers = new[] { new Customer { Id = 2, Name = "Steve" }, new Customer { Id = 3, Name = "John" } };

        var customers = secondCustomers.Where(c => !firstCustomers.Select(fc => fc.Id).Contains(c.Id));
    }

    public class Customer
    {
        public int Id { get; set; }
        public string Name { get; set; }
    }