title: How to check if a dependency object contains a dependency property?
body: <p>Essentially I want some simple reflection where I have an arbitrary DependencyProperty as a parameter. I'd have a special case (in an if statement, for example) if DependencyProperty is defined by / property of a PlaneProjection. I've done some simple fandangling of GetType() but no luck with the expected getters like MemberType.</p>
  
  <pre><code>public void SomeFunc(DependencyProperty dp)
  {
      // if dp is a dependency property of plane projection, do something
      // would maybe look like PlaneProjection.hasProperty(dp)
  }
  </code></pre>