title: MVC3 validation with data-annotation?
body: <p>Is it possible to use a data-annotation attribute for dropdownlists to  be valid, only if the user selects an option different from one with the value o (zero).
  The option with value o (zero) is "Please Select an account", which is selected by default.
  I used [Required] attribute to validate this dropdownlist, but it doesn't have any effect, because, how I said, by default the option with value o (zero)- "Please Select an account"- is selected.</p>