Custom ValidationAttribute test against whole model

Question

I know this is probably not possible but let\'s say I have a model with two properties.

I write a ValidationAttribute for one of the properties. Can that VA look at

Answer 1

Another way to achieve this kind of validation is to have your model implement IDataErrorInfo. That way you can do whole viewmodel validation.

This page has some information about iplementing the IDataErrorInfo Interface, about 2/3 of the way down under the heading "mplementing the IDataErrorInfo Interface"