title: Need example of listening for property change messages
body: <p>I have two properties of type int in my view model that broadcast their property changed events in the classic way:</p>
  
  <pre><code>RaisePropertyChanged(MyPropertyPropertyName, oldValue, value, true);
  </code></pre>
  
  <p>These properties are both of type int, so my listener begins with:</p>
  
  <pre><code>Messenger.Default.Register&lt;PropertyChangedMessage&lt;int&gt;&gt;( ????? );
  </code></pre>
  
  <p>How do I create a listener for <em>propertyA</em> separate from a listener for <em>propertyB</em>?</p>
  
  <p>Thanks</p>