Asp.NET MVC - Validate a Model Outside of the Controller

Question

I am building an ASP.NET MVC project and going for the following Architecture:

• A Core project that has models, validation, dto, logic, etc.
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Answer 1

Making a mixed Validation could be also useful, so mixing DataAnnotations with custom validations logic

This may be helpful http://www.devtrends.co.uk/blog/the-complete-guide-to-validation-in-asp.net-mvc-3-part-2