riversong-code-showcase/Source/Riversong/Game/CommonServices/Entities/Entity.cs

namespace DanieleMarotta.RiversongCodeShowcase
{
    public class Entity
    {
        public const int InvalidId = 0;

        public int Id { get; private set; }

        public static T Create<T>(int id) where T : Entity, new()
        {
            return new T { Id = id };
        }
    }
}