https://learn.microsoft.com/ja-jp/dotnet/api/system.windows.media.animation.int16animationusingkeyframes?view=netframework-4.8.1&viewFallbackFrom=windowsdesktop-10.0
Int16AnimationUsingKeyFrames Class (System.Windows.Media.Animation) | Microsoft Learn
Animates the value of a Int16 property along a set of KeyFrames.
class systemwindows mediaanimationmicrosoftlearn