title: How to style my application in WPF using app.xaml
body: <p>I've successfully added a resource dictionary (containing my theme/collection of styles template resources) to my Window.Resources. This styles each of my windows appropriately. However, when I add the same line:</p>
  
  <pre><code>&lt;ResourceDictionary Source="BureauBlack.xaml" x:Key="BureauBlackKey"/&gt;
  </code></pre>
  
  <p>To my App.xaml nothing changes.</p>
  
  <p>Edit #1:</p>
  
  <pre><code>&lt;Application x:Class="EventPlanner.App"
               xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
               xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
               xmlns:vm="clr-namespace:EventPlanner.ViewModels"
               StartupUri="MainWindow.xaml"&gt;
      &lt;Application.Resources&gt;
          &lt;ResourceDictionary&gt;
              &lt;vm:ViewModelLocator x:Key="ViewModelLocatorKey"/&gt;
              &lt;ResourceDictionary Source="BureauBlack.xaml" x:Key="BureauBlackKey"/&gt;
          &lt;/ResourceDictionary&gt;
      &lt;/Application.Resources&gt;
  &lt;/Application&gt;
  </code></pre>