title: Example of a singleton class with a dictionary of BitmapImages
body: <p>I know this is a simple question, but I can't find an example anywhere. Please think of this as helping out a newbie. I need to create a singleton class so I can access a dictionary of BitmapImages across multiple files.</p>
  
  <p>The dictionary is:</p>
  
  <pre><code>ConcurrentDictionary&lt;string, BitmapImage&gt; PlantImageDictionary;
  </code></pre>
  
  <p>Could someone please post an example of how to create/instantiate this?
  Could someone please post an example of how such a dictionary would be called?</p>
  
  <p>Thanks in advance.</p>