Any Time you appropriate the ItemsSource with the proper worth XAML doesn't quickly reilitialize the collection of things. So your DataContext for "video_length_textbox" is set to itself, along with your IncrementingTextBox class does not have a community property identified as ConfigurationModel Even though you use automatic properties or situations - https://navraj-infratech-gurgaon.mystrikingly.com/blog/ganga-realty-liv-89-gurgaon-perfect-for-families-seeking-privacy-and-peace