Validacion con decorador

No dispara
http://stackoverflow.com/questions/20430185/data-annotation-attributes-are-not-firing-in-wcf

http://blog.decarufel.net/2009/09/using-decorator-or-wrapper-design.html
http://stackoverflow.com/questions/6127290/c-sharp-add-validation-on-a-setter-method
http://en.wikipedia.org/wiki/Single_responsibility_principle
http://msdn.microsoft.com/en-us/library/ff647875.aspx#Step9
http://demos.telerik.com/kendo-ui/validator/custom-validation



http://www.codeproject.com/Articles/256183/DataAnnotations-Validation-for-Beginner