Access user control button from another user control C#

Question

I have two user controls Usercontrol1 and Usercontrol2

Usercontrol1 load into Usercontrol2, i want a situation when i press a button in Usercontrol1 an action should be perform

let me say when i press a button in Usercontrol1 a button that is enable in Usercontrol2 should be disable

Thank you