title: WPF Binding : Object in a object
body: <p>I have a form in WPF with 2 textbox :</p>
  
  <pre><code>&lt;TextBox Name="txtName" Text="{Binding Contact.Name}"/&gt;
  &lt;TextBox Name="txtAddressNumber" Text="{Binding Contact.Address.Number}"/&gt;
  </code></pre>
  
  <p>and I have 2 class :</p>
  
  <pre><code>public class ContactEntity
  {
    public string Name {get;set;}
    public AddressEntity Address {get;set;}
  }
  
  public class AddressEntity
  {
    public int Number {get;set}
  }
  </code></pre>
  
  <p>The Name property binds fine. But the Number property of the Address object inside the Contact object does not binds. What I'm doing wrong ?</p>