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FluentValidation–Conditional Validation Rule

FluentValidation is really powerful, but this power also makes it sometimes complex to find the correct way to solve a specific problem. In this case I wanted to conditionally execute a certain validation when data in another field was filled in.

FluentValidation makes this possible through the usage of the When/Unless methods. Here is a short example:

We only validate the DeliveryDate when FastDelivery is choosen.

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