title: Edit wpf control template but use original styles
body: <p>Sometimes when I'm editing a copy of the controls original template I don't need to change the original styles and colors, and would like to reference the original ones directly.</p>
  
  <p>For example, I wanted to change the <code>ComboBox</code> template to add some filtering buttons in the drop down, its toggle button refers to a Style that is also copied into the file. I would like to refer to the original style so my <code>XAML</code> isn't overly cluttered.</p>
  
  <p>Edit:
  So here is part of the XAML code that is created when you choose to edit a copy.
  The ControlTemplate is what I want to change, but I don't need the ComboBoxToggleButton Style, and so for the toggleButton I'd like to set its style to the one the ComboBoxToggleButton Style was copied from. Is there some namespace that they are all stored in, or are they inaccessible?</p>
  
  <pre><code>&lt;Style x:Key="ComboBoxToggleButton" TargetType="{x:Type ToggleButton}"&gt;
       ...
  &lt;/Style&gt;
  
  &lt;ControlTemplate x:Key="ComboBoxTemplate" TargetType="{x:Type ComboBox}"&gt;
      &lt;Grid x:Name="templateRoot" SnapsToDevicePixels="true"&gt;
          ...
          &lt;ToggleButton x:Name="toggleButton" ... Style="{StaticResource ResourceKey=ComboBoxToggleButton}"/&gt;
       &lt;/Grid&gt;
  &lt;/ControlTemplate&gt;
  </code></pre>
  
  <p>And approximately what I'd like it to be like</p>
  
  <pre><code>&lt;Window xmlns:baseStyles="{namespace/url to the default wpf styles}"&gt;
  &lt;ControlTemplate x:Key="ComboBoxTemplate" TargetType="{x:Type ComboBox}"&gt;
      &lt;Grid x:Name="templateRoot" SnapsToDevicePixels="true"&gt;
          ...
          &lt;ToggleButton x:Name="toggleButton" ... Style="{StaticResource ResourceKey=baseStyles:ComboBoxToggleButton}"/&gt;
       &lt;/Grid&gt;
       &lt;ControlTemplate.Triggers&gt;
          ...
       &lt;/ControlTemplate.Triggers&gt;
  &lt;/ControlTemplate&gt;
  </code></pre>