New Post: Dispose in CustomerController

Hi, I see below code in CustomerController:
protected override void Dispose(bool disposing)

{
    if (disposing)
    {
        _unitOfWorkAsync.Dispose();
    }
    base.Dispose(disposing);
}

Also I see the code in UnityConfig

            .RegisterType<IDataContextAsync, NorthwindContext>(new PerRequestLifetimeManager())
            .RegisterType<IUnitOfWorkAsync, UnitOfWork>(new PerRequestLifetimeManager())

As the life cycle for IDataContextAsync and IUnitOfWorkAsync is per request, why we still need to dispose in controller? for thread safe?