Silverlight: TextTrimming

Question

Hi! Is there a way to identify if TextTrimming is triggerred?

for example in my first row, text is not trimmed because its only 20 characters, in my second row text are 1500 characters and it trims the text, is there a way to identify it, like IsTextTrimmed property?

<TextBlock TextWrapping="Wrap" Text="{Binding test}" TextTrimming="WordEllipsis" />

Thank you