可以重写ASP.. NET Identity's ApplicationUser

当尝试添加Override void ParseEntity并得到以下错误消息时:

项目文件行抑制状态错误CS0115 'ApplicationUser。ParseEntity(ref ApplicationUser)':找不到合适的方法覆盖…'Models'IdentityModels.cs 47 Active

我正在尝试添加:

    public override void ParseEntity(ref ApplicationUser entity)
    {
        entity.Email = Email;
        entity.UserName = Email;
        entity.FirstName = FirstName;
        entity.LastName = LastName;
        entity.UserTypeID = UserTypeID;
        entity.ModifiedDate = DateTime.Now;
        entity.ModifiedBy = Id;
    }

到我的IdentityModel.cs。applicationuser如下所示:

public class ApplicationUser : IdentityUser<string, ApplicationUserLogin, ApplicationUserRole, ApplicationUserClaim>
    {
        public ApplicationUser()
        {
            this.Id = Guid.NewGuid().ToString();
            // Add any custom User properties/code here 
        }
        [Display(Name = "First Name")]
        [Required]
        public string FirstName { get; set; }
        [Display(Name = "Last Name")]
        [Required]
        public string LastName { get; set; }
        [Display(Name = "Guarantee Limit")]
        public Nullable<double> GuaranteeLimit { get; set; }
        [Display(Name = "User Type")]
        public int UserTypeID { get; set; }
        [Display(Name = "Terms And Conditions Version")]
        public string TermsAndConditionsVersion { get; set; }
        [Display(Name = "Last Terms And Conditions Date")]
        public DateTime ? LastTermsAndConditionsDate { get; set; }
        [Display(Name = "Last Login Date And Time")]
        public DateTime ? LastLoginDateTime { get; set; }
        [Display(Name = "Created Date")]
        public DateTime CreatedDate { get; set; }
        [Display(Name = "Modified Date")]
        public DateTime ? ModifiedDate { get; set; }
        [Display(Name = "Modified By")]
        public string ModifiedBy { get; set; }
/////////////////I want to add the override here/////////////////
        public async Task<ClaimsIdentity> GenerateUserIdentityAsync(ApplicationUserManager manager)
        {
            // Note the authenticationType must match the one defined in CookieAuthenticationOptions.AuthenticationType
            var userIdentity = await manager.CreateIdentityAsync(this, DefaultAuthenticationTypes.ApplicationCookie);
            // Add custom user claims here
            return userIdentity;
        }
    }

我能在这里添加一个覆盖还是我错过了什么?我看了一些帖子，并尝试了使用System.Web.Mvc添加的建议，但这没有区别，相同的错误信息。