using System.ComponentModel.DataAnnotations; namespace Receiver; public class Product { [Key] public int Id { get; set; } [Required] [StringLength(50)] public string Name { get; set; } = default!; [Required] [StringLength(10)] public string Code { get; set; } = default!; [Required] [Range(0, double.MaxValue)] public decimal Price { get; set; } public string Action { get; set; } = default!; }