private static void textChangedCallback(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
AutoLengthTextBlock t = (AutoLengthTextBlock)d;
t.FullText = (String)e.NewValue;
t.setText();
}
private static void TextAlignmentChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
AutoLengthTextBlock t = (AutoLengthTextBlock)d;
t.textBlock.TextAlignment = (TextAlignment)e.NewValue;
}