сделала что смогла и к сожалению я вырубаюсь и иду спать

Confectionery/ConfectioneryBusinessLogic/ConfectioneryBusinessLogic.csproj

@@ -18,6 +18,7 @@
 
   <ItemGroup>
     <ProjectReference Include="..\ConfectioneryContracts\ConfectioneryContracts.csproj" />
+    <ProjectReference Include="..\ConfectioneryDataModels\ConfectioneryDataModels.csproj" />
   </ItemGroup>
 
 </Project>

Confectionery/ConfectioneryBusinessLogic/ImplementerLogic.cs

@@ -1,4 +1,9 @@
 using Microsoft.Extensions.Logging;
+using ConfectioneryContracts.BindingModels;
+using ConfectioneryContracts.BusinessLogicsContracts;
+using ConfectioneryContracts.SearchModels;
+using ConfectioneryContracts.StoragesContracts;
+using ConfectioneryContracts.ViewModels;
 using System;
 using System.Collections.Generic;
 using System.Linq;

Confectionery/ConfectioneryBusinessLogic/OrderLogic.cs

@@ -22,7 +22,24 @@ namespace ConfectioneryBusinessLogic
             _logger = logger;
             _orderStorage = orderStorage;
         }
-        public List<OrderViewModel>? ReadList(OrderSearchModel? model)
+		public OrderViewModel? ReadElement(OrderSearchModel model)
+		{
+			if (model == null)
+			{
+				throw new ArgumentNullException(nameof(model));
+			}
+			_logger.LogInformation("ReadElement. ClientId:{ClientId}.Status:{Status}.ImplementerId:{ImplementerId}.DateFrom:{DateFrom}.DateTo:{DateTo}OrderId:{Id}",
+				model.ClientId, model.Status, model.ImplementerId, model.DateFrom, model.DateTo, model.Id);
+			var element = _orderStorage.GetElement(model);
+			if (element == null)
+			{
+				_logger.LogWarning("ReadElement element not found");
+				return null;
+			}
+			_logger.LogInformation("ReadElement find. Id:{Id}", element.Id);
+			return element;
+		}
+		public List<OrderViewModel>? ReadList(OrderSearchModel? model)
         {
             _logger.LogInformation("ReadList. OrderId:{Id}", model?.Id);
             var list = model == null ? _orderStorage.GetFullList() : _orderStorage.GetFilteredList(model);

Confectionery/ConfectioneryContracts/BindingModels/ImplementerBindingModel.cs

@@ -1,4 +1,4 @@
-using ConfectioneryDataModels;
+using ConfectioneryDataModels.Models;
 using System;
 using System.Collections.Generic;
 using System.Linq;

Confectionery/ConfectioneryContracts/BindingModels/OrderBindingModel.cs

@@ -13,7 +13,8 @@ namespace ConfectioneryContracts.BindingModels
         public int Id { get; set; }
         public int PastryId { get; set; }
         public int ClientId { get; set; }
-        public int Count { get; set; }
+		public int? ImplementerId { get; set; }
+		public int Count { get; set; }
         public double Sum { get; set; }
         public OrderStatus Status { get; set; } = OrderStatus.Неизвестен;
         public DateTime DateCreate { get; set; } = DateTime.Now;

Confectionery/ConfectioneryContracts/ViewModels/ImplementerViewModel.cs

@@ -1,4 +1,4 @@
-using ConfectioneryDataModels;
+using ConfectioneryDataModels.Models;
 using System;
 using System.Collections.Generic;
 using System.ComponentModel;

Confectionery/ConfectioneryDatabaseImplement/Implementer.cs

@@ -9,7 +9,7 @@ using ConfectioneryDataModels.Models;
 using System.ComponentModel.DataAnnotations.Schema;
 using System.ComponentModel.DataAnnotations;
 
-namespace ConfectioneryDatabaseImplement
+namespace ConfectioneryDatabaseImplement.Models
 {
 	public class Implementer : IImplementerModel
 	{

Confectionery/ConfectioneryFileImplement/Implementer.cs

@@ -54,8 +54,6 @@ namespace ConfectioneryFileImplement.Models
 			};
 		}
 
-
-
 		public void Update(ImplementerBindingModel model)
 		{
 			if (model == null)

Confectionery/ConfectioneryFileImplement/ImplementerStorage.cs

@@ -2,7 +2,7 @@
 using ConfectioneryContracts.SearchModels;
 using ConfectioneryContracts.StoragesContracts;
 using ConfectioneryContracts.ViewModels;
-using ConfectioneryDatabaseImplement;
+using ConfectioneryFileImplement.Models;
 using System;
 using System.Collections.Generic;
 using System.Linq;

Confectionery/ConfectioneryListImplement/DataListSingleton.cs

@@ -14,13 +14,15 @@ namespace ConfectioneryListImplement
         public List<Order> Orders { get; set; }
         public List<Pastry> Pastrys { get; set; }
         public List<Client> Clients { get; set; }
-        private DataListSingleton()
+		public List<Implementer> Implementers { get; set; }
+		private DataListSingleton()
         {
             Components = new List<Component>();
             Orders = new List<Order>();
             Pastrys = new List<Pastry>();
             Clients = new List<Client>();
-        }
+			Implementers = new List<Implementer>();
+		}
         public static DataListSingleton GetInstance()
         {
             if (_instance == null)

Confectionery/ConfectioneryListImplement/ImplementerStorage.cs

@@ -2,6 +2,7 @@
 using ConfectioneryContracts.SearchModels;
 using ConfectioneryContracts.StoragesContracts;
 using ConfectioneryContracts.ViewModels;
+using ConfectioneryListImplement.Models;
 using System;
 using System.Collections.Generic;
 using System.Linq;