// Query
    hamsters.AsQueryable().OfType<Hamster>().Where(hamster => hamster.Color == Color.White).ToList();
    
    // Types
    public class Hamster
    {
        public ObjectId Id { get; private set; }
        public Color Color { get; private set; }

        public Hamster(Color color)
        {
            Color = color;
            Id = ObjectId.GenerateNewId();
        }
    }

    public enum Color : ushort
    {
        Black = 0,
        White = 1,
    }

Unsupported where clause: ((Int32)hamster.Color == 1).