Gets or sets the EnterAnimationRate property. This dependency property
indicates the default animation rate that will be used by panels within
the Layouts collection that do not explicitly specify their own EnterAnimationRate value.
Target Platforms: Windows 11, Windows 10, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2