public static void ValidateRegistrations( this IResolver resolver) { var exceptions = new List <Exception>(); foreach (var type in resolver.GetRegisteredServices().Where(t => !t.IsClosedTypeOf(typeof(IAggregateRoot <>)))) { try { resolver.Resolve(type); } catch (Exception ex) { exceptions.Add(ex); } } if (!exceptions.Any()) { return; } var message = string.Join(", ", exceptions.Select(e => e.Message)); throw new AggregateException(message, exceptions); }