Hands-On Mobile Development with .NET Core

Attached properties

Another way to implement behaviors in order to modify default control behavior is to use attached properties to declare a bindable extension to existing controls. This approach is generally used for small behavioral adjustments, such as enabling/disabling other behaviors, as well as adding/removing effects. Let's get started:

1. In order to implement such a behavior, we need to create a bindable property that will be used on other controls:

 public static class Validations {     public static readonly BindableProperty ValidateRequiredProperty =         BindableProperty.CreateAttached(             "ValidateRequired",             typeof(bool),             typeof(RequiredValidation),             false,              propertyChanged: OnValidateRequiredChanged);      public static bool GetValidateRequired ...