title: Get value of Xamarin Forms Custom Rendered Checkbox
body: <p>I have a Checkbox view rendering properly in Xamarin Forms:</p>
  
  <pre><code>public class CheckBoxRenderer : ViewRenderer&lt;LegalCheckbox, CheckBox&gt;
      {
          protected override void OnElementChanged(ElementChangedEventArgs&lt;LegalCheckbox&gt; e)
      {
          base.OnElementChanged (e);
          CheckBox control = new Android.Widget.CheckBox(this.Context);
          control.Checked = false;
          control.Text = "I agree to terms";
          control.SetTextColor (Android.Graphics.Color.Rgb (60, 60, 60));
          this.SetNativeControl(control);
      }
  }
  </code></pre>
  
  <p>I want to check whether or not this checkbox is checked or not. Is there a way I can do this? Do I need to use dependency service?</p>