activestep/Step.Model/DTOModels/ToolModels/DTOShankModel.cs

using CMS_CORE_Library.Models;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;

namespace Step.Model.DTOModels.ToolModels
{
    public class DTOShankModel
    {
        public int Id;
        [Required]
        public string Name { get; set; }
        [Required]
        public bool IsEnabled { get; set; }
        [Required]
        public bool IsInhibited { get; set; }
        [Required]
        public bool InChangeTool { get; set; }
        [Required]
        public bool InFixedPlace { get; set; }
        [Required]
        public bool InUse { get; set; }
        [Required]
        public int LeftSize { get; set; }
        [Required]
        public int RightSize { get; set; }
        [Required]
        public int MagazinePositionType { get; set; }

        public List<DTOShankChildModel> ChildsTools { get; set; }

        public static explicit operator ShankModel(DTOShankModel obj)
        {
            List<ShankChildModel> childs = obj.ChildsTools?.Select(x => new ShankChildModel
            {
                Id = x.Id,
                FamilyName = x.FamilyName,
                MultitoolId = x.MultitoolId,
                ToolType = x.ToolType
            }).ToList();


            return new ShankModel()
            {
                Id = 0,
                Name = obj.Name,
                IsEnabled = obj.IsEnabled,
                IsInhibited = obj.IsInhibited,
                InChangeTool = obj.InChangeTool,
                InFixedPlace = obj.InFixedPlace,
                InUse = obj.InUse,
                LeftSize = obj.LeftSize,
                RightSize = obj.RightSize,
                MagazinePositionType = obj.MagazinePositionType,
                ChildsTools = childs
            };
        }
    }
    public class DTOShankChildModel
    {
        public int Id;
        [Required]
        public int MultitoolId;
        [Required]
        public string FamilyName;
        [Required]
        public int ToolType;
    }
}