Buttons with images in WPF

I'm new to WPF and I'm trying to create a button, where the content of it will have only a background image and nothing else. It will have no border, background color or text, just a clickable image.

I tried to do it:

<Button>
    <StackPanel>
        <Image Source="images\icon_button_exit.png" />
    </StackPanel>
</Button>

But the result was not pleasant ...

I want something like this:

Andthenwhentheuserhoveredoverthebuttonorclicked,asimilareffectwouldhappen:

What is the best way to do this?