What does the bindinglistener in mvvmlight do

I have been doin开发者_JAVA百科g some silverlight recently and was told that the bindinglistener in mvvmlight would be helpful.what does this class do?

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In Silverlight 3, you cannot derive from DependencyObject, so you cannot add DependencyProperties to just any object. To work around that, you can use a BindingListener that will listen to property changes and then notify the bindings that something happened.

This limitation was lifted in Silverlight 4 so you don't need the binding listener if you upgrade to this version of Silverlight.

Makes sense? Cheers, Laurent