aspnetcore/samples/IdentitySample.Mvc/Models/AccountViewModels/UseRecoveryCodeViewModel.cs

using System.ComponentModel.DataAnnotations;

namespace IdentitySample.Models.AccountViewModels
{
    public class UseRecoveryCodeViewModel
    {
        [Required]
        public string Code { get; set; }

        public string ReturnUrl { get; set; }
    }
}