vb.net - WPF - Animating gridlength in XAML -

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I was just wondering whether it is possible to animate the grid height using pure XAML? I looked at this tutorial:

But it seems that there is a need to write a custom function. Is it possible to do this only by XAM?

The box is not possible because there is no such class as a grid-length animation (double animation Compare with) If such a class is in existence (you, Microsoft or third party) then there will be a pure xml solution.


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