How to change\set background image of a button in C# WPF code?

Question

I\'m trying to change background image of my button to some other image and I encountered some errors. This is the code I have on my xaml:

Answer 1

I give a code snippet below, assing the style mentioned in code snippet to a button or to a toggle button, then you shall ve the changed background controlled totally by XAML...no other coding needed. I am not givin all the code just try to understand the logic behind ;)