EF-Core data reference [Answered]

        [Key]
        public int ReservationID { get; set; }

        public string? FirstName { get; set; }

        public string? LastName { get; set; }

        public string? Adress { get; set; }

        public string? City { get; set; }

        public string? Email { get; set; }

        public int GuestsComing { get; set; }

        public DateTime? Date { get; set; }

        public TimeSpan? Time { get; set; }

        public List<Menu> ChoosenMenus { get; set; }

        public decimal FoodPrice { get; set; }

        public int UserFK { get; set; }

        modelBuilder.Entity<Reservation>()
            .HasOne<UserInfo>()
            .WithMany()
            .HasForeignKey(x => x.UserFK);