test2

[MetadataType(typeof(UserMetadata))]
    public partial class User
    {
        internal sealed class UserMetadata
        {

            [Required(ErrorMessage = "ID is required")]
            public Int32 ID { get; set; }

            [Required(ErrorMessage = "*")]
            [Display(Name = "账号名")]
            [StringLength(50)]
            public String Name { get; set; }

            [Required(ErrorMessage = "*")]
            [Display(Name = "电话号码")]
            [StringLength(50)]
            [DataType(DataType.PhoneNumber)]
            public String Phone { get; set; }

            [Display(Name = "用户类型")]
            [StringLength(50)]
            public String UserType { get; set; }

        }
    }