<Window
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  xmlns:diag="clr-namespace:System.Diagnostics;assembly=WindowsBase"
  xmlns:src="clr-namespace:SDKSample">
  <Window.Resources>
    <src:Person x:Key="myDataSource" PersonName="Joe"/>
  </Window.Resources>


...


<TextBox>
    <TextBox.Text>
        <Binding Source="{StaticResource myDataSource}" Path="PersonName"
                 diag:PresentationTraceSources.TraceLevel="High"/>
    </TextBox.Text>
</TextBox>


...


</Window>