title: How do I set the default text of a textbox with a Binding of RelativeSource Self
body: <p>On the initial page load, I am setting it up so that the form is ready to enter a new record.  For some custom data validators, I set the binding to itself.  My question is how can I set the default text to something?</p>
  
  <pre><code>&lt;TextBox&gt;
      &lt;TextBox.Text&gt;
          &lt;Binding RelativeSource="{RelativeSource Self}"
                   Path="Text"
                   UpdateSourceTrigger="LostFocus" &gt;
              &lt;Binding.ValidationRules&gt;
                  &lt;validators:MyCustomValidators /&gt;
              &lt;/Binding.ValidationRules&gt;
          &lt;/Binding&gt;
      &lt;/TextBox.Text&gt;
  &lt;/TextBox&gt;
  </code></pre>