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MediaTimeline.FreezeCore Method

Makes this instance of MediaTimeline unmodifiable or determines whether it can be made unmodifiable.

Namespace:  System.Windows.Media
Assembly:  PresentationCore (in PresentationCore.dll)

protected override bool FreezeCore(
	bool isChecking


Type: System.Boolean

true to check if the timeline can be frozen; false to freeze the timeline.

Return Value

Type: System.Boolean
If isChecking is true, this method returns true if this MediaTimeline can be made unmodifiable, or false if it cannot be made unmodifiable. If isChecking is false, this method returns true if the specified MediaTimeline is now unmodifiable, or false if it cannot be made unmodifiable, with the side effect of having made the actual change in frozen status to this object.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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