I NEED CODES FOR C# (VISUAL STUDIO 2015)

I want C# codes for the following.

first, when I start the program there is just two buttons in the form, "Display Picture" and RESET",

when I click on the button "Display Picture", an image appear from in a picturebox. and when I click on the button "RESET", the form reset as in the beginning and clear everything so that I can click the button "display picture" to see the picture again, and when I click "reset" again it resets again, and so on.