for_vika/praktika_2/ind_characteristic.cs

namespace praktika_2
{
    using System;
    using System.Collections.Generic;
    using System.ComponentModel.DataAnnotations;
    using System.ComponentModel.DataAnnotations.Schema;
    using System.Data.Entity.Spatial;

    public partial class ind_characteristic
    {
        [DatabaseGenerated(DatabaseGeneratedOption.None)]
        public int id { get; set; }

        public int? id_material_value { get; set; }

        public int count { get; set; }

        [Required]
        [StringLength(255)]
        public string characteristic { get; set; }

        public virtual material_value material_value { get; set; }
    }
}