title: Windows Phone 7 (WP7) Change a button's background color on click
body: <p>This seems like a really, really simple problem, but I can't figure it out. The culprit appears to be WP7's default style. It changes the background color to white when a button is clicked, then back to the button's default background.</p>
  
  <p>The problem I have is I want to change the button's background when the button is clicked. I can't find any possible way to do this.</p>
  
  <p>I've tried setting the background in code, but that does nothing. I think it's being overwritten by the default style.</p>
  
  <p>I've tried using a Property Change behavior in Blend, but that has the exact same result.</p>
  
  <p>I've tried creating a new visual state for the button and setting that on click, but that's a little buggy and has a large overhead for the number of buttons I'm dealing with. Also, it didn't work.</p>
  
  <p>I can set other buttons' background on a click event, just not the button being clicked.</p>
  
  <p>This is such an annoying roadblock! I'm sure this is a one line of code kind of answer. :)</p>