title: WPF Binding to property and setting another
body: <p>I'm using MVVM in my WPF application.<br>
  I have a Window that has a view inside it. In that view a value can be changed and I will bind it to a TextBox in my main Window:</p>
  
  <pre><code>&lt;TextBox
      Text="{Binding Path=myViewModel.MyValue"&gt;
  &lt;/TextBox&gt;
  </code></pre>
  
  <p>Now I would need to bind this <strong>myViewModel.MyValue</strong> to a property inside my main window view model, so that I can use it to perform a filter in a collection.</p>
  
  <p>Can I use a Setter or any other thing that sets the value of my <strong>MainViewModel.Property</strong> whenever the <strong>myViewModel.MyValue</strong> changes?<br>
  If so, how can I do it?</p>