How to make a reset button in a combobox?

Question

WPF

Hello, please help me make a button to reset all values ​​in the combobox element, I just have a problem, if for example I select another group, then an error occurs that you need to specify the final element, I figured out that you can simply add a button with the name of another student's choice, which resets all values ​​in my comboboxes and allows you to select a new group, student, etc. because my data is all connected.

Answer 1

I recommend that you familiarize yourself with the MVVM pattern for developing under WPF, and then you will not have to fence the garden to replace lists.