Custom model validation of dependent properties using Data Annotations

Question

Since now I\'ve used the excellent FluentValidation library to validate my model classes. In web applications I use it in conjunction with the jquery.validate plugin to per

Answer 1

I had this very problem and recently open sourced my solution: http://foolproof.codeplex.com/

Foolproof's solution to the example above would be:

public class Event
{
    [Required]
    public DateTime? StartDate { get; set; }

    [Required]
    [GreaterThan("StartDate")]
    public DateTime? EndDate { get; set; }
}