Overriding Roles and adding JsonIgnore Attribute

gistfile1.cs

    public class ApplicationUser : IdentityUser
    {
        [Required]
        public string FirstName { get; set; }

        [Required]
        public string LastName { get; set; }

        [Required]
        public string Email { get; set; }
        
        // IdentityUserRole contains a reference to the user, and a role. This is where the circular reference comes from. 
        [JsonIgnore]
        public override ICollection<IdentityUserRole> Roles {
          get {
            return base.Roles;
          }
        }
    }