How to correctly display a list in a ComboBox in WPF?

Question

WPF

Greetings! There was a problem, I want to make 4 UserControl to perform similar but different tasks. I created two controls that have the same interface, created a list of these two controls, and I'm trying to connect this list to the ComboBox. And I can't understand anything. I did so, and in Main I specified DataContext = this; How to solve such a problem in a normal way?
<ComboBox itemSource={"Binding myList"}/>