What is a "Freezable" subtype in WPF/Silverlight?

Question

What is a "Freezable" subtype in WPF/Silvellight?

Answer 1

Important thing. Silverlight doesn't contains Freezable or FreezableCollection in it's infrastructure.

http://msdn.microsoft.com/en-us/library/cc903925(VS.95).aspx

http://www.charlespetzold.com/blog/2008/11/Text-on-a-Path-in-Silverlight.html

Answer 2

A freezable object is one that has a mechanism that allows you to "Freeze" it. This locks downs all the state and makes the object immutable. This makes the object more performant to use and safer to share between threads.

http://msdn.microsoft.com/en-us/library/ms750509.aspx