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Correspondingly, an underlying data value in the view model is automatically updated when the user modifies the bound value in the view.

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The latter can for example be very useful for bindings in Styles and Control Templates and when you want to bind to some property in a parent element.Once you have created a converter class you will typically add it as a resource in XAML with a unique x: Key attribute and then reference it from the binding as a Static Resource: (string) to a dependency property of type string you don’t necessarily need to use a converter as the default conversion will automatically apply the To String() method on the value of the source property.This means that you don’t have to use a converter to display a If a user enters an invalid value that cannot be converted to an int and be set as the value for the Age property in the view model in the above example, a validation error will occur and a visual feedback will be provided to the user to indicate this.Now that you can see the actual error message, which reads “Value …

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could not be converted” when the conversion of the string value to an int fails, you may want to customize it.Error Template attached property of the control: Note that the Validation.