EntLib Validation problem on GetType(object) - expects string not object???

Answer 1

I would just get rid of the ValidatorComposition and TypeConversionValidator declarations as I think they are redundant here. That would get rid of your error and a couple of lines of code too.

The property is already strongly-typed to the Address class so there is no way you can set it in code to an object that isn't an Address or isn't polymorphic with Address - having an extra validator to check this is redundant.

The default composition of validators is logical AND anyway, you only need to specify validator composition when you want to OR a group, or use more complex groups that combine AND / OR.