using System;

using System.ComponentModel.DataAnnotations;

​

public class Program

{

    public static void Main()

    {

    }

​

    [MetadataType(typeof (ICustomerMetaData))]

    public partial class Customer

    {

    }

​

    public interface ICustomerMetaData

    {

        // Apply RequiredAttribute

        [Required(ErrorMessage = "Title is required.")]

        string Title

        {

            get;

        }

    }

}