c# - Styling all instances of a derived type in WPF -

i have class named mywindow derives window:

using system.windows;  public class mywindow : window { } 

and use class in mainwindow.xaml:

<mywpfapp:mywindow x:class="mywpfapp.mainwindow"         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:wpfapplication1="clr-namespace:wpfapplication1"           title="mainwindow" height="350" width="525">     <grid>         <textblock text="test" foreground="orange"/>     </grid> </mywpfapp:mywindow> 

and in app.xaml file, add following style override background property of mywindow instances:

<application.resources>     <style targettype="mywpfapp:mywindow">         <setter property="background" value="black"></setter>     </style> </application.resources> 

but doesn't change @ all. no style applied mainwindow.

what should can use global style mywindows?

p.s.: checked out "modern ui"s code, saw apply following in window's constructor:

using system.windows;  public class mywindow : window {     public mywindow()     {         defaultsylekey = typeof (mywindow);     } } 

but if this, mainwindow ends being black in content area. guessing somehow template property gets overriden, don't understand how, , how make work.

ok have worked out. apparently there's special file can use named generic.xaml.

you need add style definitions there , add file directory called themes.

wpf end using fall back: themes\generic.xaml