Error: "is not an attribute class" when using ConfigurationElementType attribute

Question

I'm trying to create a custom exception handler for the exception handling block of enterprise library 5.0. As far as I understand I need to start the class off with the attribute "[ConfigurationElementType(typeof(CustomHandlerData))]". But I get an error stating the ConfigurationElementType is not an attribute class.

Does anyone know what might be going on?

Answer 1

Try adding the keyword Attribute after ConfigurationElementType. It is not required, but this may get you to a more helpful error message... my guess would be that you are missing references... that's always the problem with EntLib.

Answer 2

Be sure to add the reference to the System.ComponentModel.Compostion or Sytem.ComponentModel.DataAnnotations to your project under Project-Add References .Net tab.

Then you should be able to include 'using System.ComponentModel;' in your project to get your attributes working properly.