title: Set Visibility based on multiple properties
body: <p>I have a Canvas that I want to hide or show based off of 2 dependency properties:</p>
  
  <pre><code>IsPropA
  IsPropB
  </code></pre>
  
  <p>If either of these are true I want the Canvas to display.  If both are false I want the Canvas to be hidden.</p>
  
  <p>I know how I can do it with just 1 property.  But I'm unsure of how to do it with multiple properties.</p>
  
  <pre><code>&lt;Canvas Grid.Row="2" x:Name="sesimicTeam" Visibility="{Binding IsPropA}"&gt;
  </code></pre>