title: I can't change the fontsize on Listview items or column headers
body: <pre><code>    &lt;ListView x:Name="lstProductionOrders"&gt;
           &lt;ListView.View&gt;
                &lt;GridView&gt;
                     &lt;GridViewColumn Header="Production Order:"/&gt;
                          ...
  </code></pre>
  
  <p>I've set the fontsize on the grid, using textelement, I've set it on the listview, the columnheader, through styles, through styles using BasedOn. I even put in a brand new test window that had no other code in it but the default code and a listview created the same way above. Using all of the above, the font changes in design-time but not in run-time. </p>
  
  <p>I've only got about 6 months of WPF/XAML experience, so I may be looking for the wrong thing. Is there some kind of global setting for fontsize or anything anyone can think of that would be causing this to be overridden. </p>
  
  <p>For the record, I with the test window, there are no base classes. </p>
  
  <p>----------EDIT----------</p>
  
  <p>This was the source of the problem in App. xaml</p>
  
  <pre><code>&lt;Style TargetType="TextBlock"&gt;
          &lt;Setter Property="FontFamily" Value="Times New Roman"/&gt;
          &lt;Setter Property="FontSize" Value="20"/&gt;
  &lt;/Style&gt;
  </code></pre>