Autofac in Attributes

Google search: "registering autofac in attributes"

- https://stackoverflow.com/questions/32614912/autofac-injection-into-attribute
- https://stackoverflow.com/questions/26014489/autofac-property-injection-with-mvc-validationattribute
- https://stackoverflow.com/questions/5218333/asp-net-mvc3-set-custom-iserviceprovider-in-validationcontext-so-validators-can
- https://stackoverflow.com/questions/301371/why-is-dictionary-preferred-over-hashtable