true if the context property is okay with the new context; otherwise, false.
Once all the context properties have been added to the new context, they are all queried as to whether they are okay in the new context. The context property could look at the other context properties in the Context.ContextProperties property of the new context and determine whether it is compatible with these other context properties.
By default, the ContextAttribute.IsNewContextOK(Context) method returns true.