I am reading about validation in Xamarin Forms apps in this article written by @DavidBritch https://blog.xamarin.com/validation-xamarin-forms-enterprise-apps/
It used class ValidatableObject but where is that class? I cannot find it anywhare?
It is created by himself. You could find it in its GitHub. Please check the following link:https://github.com/dotnet-architecture/eShopOnContainers/blob/1b7200791931f33c94206822a69644ca820bb0dc/src/Mobile/eShopOnContainers/eShopOnContainers.Core/Validations/ValidatableObject.cs
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