Silverlight 4 toolkit AutoCompleteBox Text property not working

I capture the KeyUp event on an AutoComplete box from the Silverlight toolkit. If they press Escape I want to clear the value by calling autocompletebox.Text = string.Empty. This works most of the t开发者_JAVA百科ime, but whenever I set this when the whole field is selected it does not work. Is there another property that I should be setting instead of Text?

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Try also assigning null to the SelectedItem property.

BTW Why are you using the toolkit, Silverlight 4 has an AutoCompleteBox, are you using SL3?

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For anyone who may encounter this problem, it turns out that while you can set the Text property, the best approach is to set the SelectedItem property. I will submit this as a bug on Codeplex.