RachelRachel 133k6767 Gold badges315315 silver badges510510 bronze badges 2 three Rachel, you are a beautiful genius!!! And I am an idiot. Thank you a great deal of for the answer. I had been binding to self and didn't have a 'ConfigurationModel' property in my IncrementingTextBox class. Normally it's going to https://medium.com/@CentralPark104/