Business Validation Logic Code Smell

Question

Consider the following code:

partial class OurBusinessObject {
    partial void OnOurPropertyChanged() {
        if(ValidateOurProperty(this.OurProperty) ==          


        

Answer 1

Furthermore, why in the world is this partial? Using partial classes for anything but a generated code framework is itself is a codesmell since you're likely using them to hide complexity which should be split up anyways!