Customizable keybinds C#

Hello all,

 

So basically, in my programming the user can press the default key that i have set, which is F1, to enable a feature. However, i want the user to be able to change this key. so for example, a dialog pops up and asks them to enter the key they want to set for that feature then it changes the F1 (default key) to the new key that the user chose. How do i do this?