如何获取WPF中的默认Tab键顺序（即Visual Tree顺序）？

I'm adding a validation module to my application which will guide the user to the inputs that need attention. I would like to go through these controls in the same order that they were added to the Visual Tree. The Tab Index for each control is set to Int Max, which means just go in order of the Visual Tree. I'm adding a validation module to my applicatio