In the previous chapter, we showed you how the MVC Framework creates model objects from HTTP requests through the model binding process. Throughout that chapter, we worked on the basis that the data the user supplied was valid. The reality is that users will often enter data that we cannot work with, which leads us to the topic of this chapter—model validation.KeywordsModel ValidationAppointment ObjectValidation ErrorValidation RuleValidation LogicThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.