RachelRachel 133k6767 gold badges315315 silver badges510510 bronze badges two 3 Rachel, you are a gorgeous genius!!! And I am an idiot. Thank you a great deal of for the answer. I used to be binding to self and didn't have a 'ConfigurationModel' property in my IncrementingTextBox class. So your DataContext https://m3msector58apartmentgurgaon.blogspot.com