https://learn.microsoft.com/zh-cn/dotnet/api/system.windows.media.animation.int32keyframe.value?view=netframework-4.8.1&viewFallbackFrom=windowsdesktop-10.0
Int32KeyFrame.Value Property (System.Windows.Media.Animation) | Microsoft Learn
Gets or sets the key frame's target value.
value propertywindows mediasystemanimationmicrosoft