private static void OnNumColumnsUpdated(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
TablePanel t = (TablePanel)d;
t.InvalidateMeasure();
}
private static void InRowSpacingUpdated(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
TablePanel t = (TablePanel)d;
t.InvalidateMeasure();
}