RachelRachel 133k6767 Gold badges315315 silver badges510510 bronze badges two 3 Rachel, you are an attractive genius!!! And I am an fool. Thank you so much for the answer. I had been binding to self and did not have a 'ConfigurationModel' property in my IncrementingTextBox course. So your DataContext for "video_length_textbox" https://theprwave.blogspot.com