title: How to change disabled Textbox Background colour in WPF to transparent
body: <p>I wanted to change the disabled background of my Textbox to a semitransparent Gradientbrush (one part transparent the other not).<br>
  I found this older post to a almost identical topic: <a href="https://stackoverflow.com/questions/3751990/how-to-change-disabled-background-color-of-textbox-in-wpf">this one</a><br>
  The accepted answer worked for my, as long as I did not wanted to add any transparency to it. Instead the transparent part of the background turns to some shade of gray.</p>
  
  <p>How can I fix this a nice and clean way, the Template form the <a href="https://msdn.microsoft.com/de-de/library/ms752068%28v=vs.110%29.aspx" rel="nofollow noreferrer">MS-Page</a> might do the trick, but they always look so awfully giant for such small issues.</p>