Jan Kučera

It is also an implementation detail for performance optimization, what would be the benefit of 3rd party animations using the same type used internally (as opposed to defining their own)?

And updates on the index parameter?

Is `TryGet` with `T` being `object` compatible with the deprecated APIs?

LGTM

I prefer the second approach, if snippets are candidates for Roslyn then the ability to define/implement what the XML snippets do sounds like a good feature-baseline. (and it does not...

Well technically developers do not need to rely on the built-in InitializeComponents and could handle the XAML themselves. Not saying that many (or any) do, but it could be potentially...

The leading and trailing overhang need to have the same sign to match WPF: negative outside, positive inside.

I think the second to last link states it pretty clearly: > - The display will not switch to discrete GPU in the following scenarios - > - The display...

Is unsealing the WPF one an option?

Tested? Code changes look good to me. Would it make sense to have a reference to something holding the cached row number so that it doesn't have to be searched...