DropDown provides keyboard support that can be used to navigate through the drop down list. The keyboard navigation keys can replace the use of mouse by allowing you to edit and navigate through the drop down list. The keys and their corresponding actions are listed below:

Keys	Actions
Arrow Up and Down	Navigates through the list of items in the drop down. If drop down isn't open, it remains hidden but the next item is selected.
Enter	Begins/Ends editing, selects the highlighted item, and hides the drop down
Esc	Hides the drop down
Tab	Jumps between different controls on the platforms that support tab stops (UWP)