DataAnnotations vs IDataErrorInfo

Question

DataAnnotations vs IDataErrorInfo

Pros and Cons of both? Benefits of one over the other? (especially related to MVC)

Answer 1

DataAnnotations are easier to implement, and getting directly support in MVC 2.0.

However, IDataErrorInfo allows you do to more complex validation (ie: validation that spawns multiple properties, etc).

The two can be mixed, and used together, however. There is nothing stopping you from implementing both techniques.