New Post: Issues setting up FluentValidation with Castle.Windsor

Hi

It looks like you're using the wrong FluentValidationModelValidatorProvider. There are two - one for MVC and one for WebApi. You seem to be using the WebAPI one.

Make sure you're using FluentValidation.Mvc.FluentValidationModelValidatorProvide not FluentValidation.Mvc.__WebApi.__FluentValidationModelValidatorProvider

Jeremy