title: How to use resource dictionary in WPF
body: <p>I'm new to WPF and I don't understand well how resource dictionary works. I have Icons.xaml that looks like:</p>
  
  <pre><code>&lt;ResourceDictionary xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"&gt;
  &lt;Canvas x:Key="appbar_3d_3ds" Width="76" Height="76" Clip="F1 M 0,0L 76,0L 76,76L 0,76L 0,0"&gt;
      &lt;Path Width="32" Height="40" Canvas.Left="23" Canvas.Top="18" Stretch="Fill" Fill="{DynamicResource BlackBrush}" Data="F1 M 27,18L 23,26L 33,30L 24,38L 33,46L 23,50L 27,58L 45,58L 55,38L 45,18L 27,18 Z "/&gt;
  &lt;/Canvas&gt;
  
  &lt;Canvas x:Key="appbar_3d_collada" Width="76" Height="76" Clip="F1 M 0,0L 76,0L 76,76L 0,76L 0,0"&gt;
      &lt;Path Width="44" Height="30.3735" Canvas.Left="15" Canvas.Top="21.6194" Stretch="Fill" Fill="{DynamicResource BlackBrush}" Data="F1 M 39.2598,21.6194C 47.9001,21.6194 55.3802,24.406 59,28.4646L 59,33.4834C 56.3537,29.575 49.2267,26.7756 40.85,26.7756C 30.2185,26.7756 21.6,31.285 21.6,36.8475C 21.6,40.4514 25.2176,43.6131 30.6564,45.3929C 22.7477,43.5121 17.2,39.1167 17.2,33.9944C 17.2,27.1599 27.0765,21.6194 39.2598,21.6194 Z M 35.8402,51.9929C 27.1999,51.9929 19.7198,49.2063 16.1,45.1478L 15,40.129C 17.6463,44.0373 25.8733,46.8367 34.25,46.8367C 44.8815,46.8367 53.5,42.3274 53.5,36.7648C 53.5,33.161 49.8824,29.9992 44.4436,28.2194C 52.3523,30.1002 57.9,34.4956 57.9,39.6179C 57.9,46.4525 48.0235,51.9929 35.8402,51.9929 Z "/&gt;
  &lt;/Canvas&gt;
  &lt;/ResourceDictionary&gt;
  </code></pre>
  
  <p>How can I use for example "app_3d_collada" in my xaml ? I have for example MenuItem and I would like to use this icon as my MenuItem icon.</p>