Makes this instance a modifiable deep copy of the specified ThicknessKeyFrameCollection using current property values. Resource references, data bindings, and animations are not copied, but their current values are.
Assembly: PresentationFramework (in PresentationFramework.dll)
This method is called by the CloneCurrentValue method and should not be called directly from your code, except when calling the base implementation while overriding this method. To create a modifiable copy of the current object, call CloneCurrentValue instead of calling this method directly.
For more information, see Freezable.CloneCurrentValueCore.