Given the following where MyEnum is an optional value, where the default is null:

public async Task<IEnumerable<object>> DoSomethingAsync(MyEnum? myE) { // do something // e.g. if(myE == null) {} else {} } public enum MyEnum { MyValOne = 0, MyValTwo = 1 }

And providing the query string with an invalid value (e.g. ?myE=asd) the request will fail via the ModelBindingMessageProvider and AttemptedValueIsInvalidAccessor; where the message is The value '{0}' is not valid for {1}..

However, with a nullable type, the {1} results in the message:

`The value 'asd' is not valid for Nullable`1. 

I see a work around using localisation on the message, but should the message not attempt to find the underlying Type rather than the nullable?

Is this loosely related to #2985?