Создание сущностей Headset, Orders, SalesSalons

FurnitureFactory/FurnitureFactoryDataModels/Models/IHeadsetModel.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace FurnitureFactoryDataModels.Models
+{
+    internal interface IHeadsetModel : IId
+    {
+        int Cost { get;}
+        string Size { get; }
+        public Dictionary<int, IHeadsetModuleModel> HeadsetModuleId { get; }
+    }
+}

FurnitureFactory/FurnitureFactoryDataModels/Models/IOrdersModel.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace FurnitureFactoryDataModels.Models
+{
+    internal interface IOrdersModel : IId
+    {
+        DateTime Date { get; }
+        string Status { get; }
+        public Dictionary<int, IFurnitureModel> FurnitureId { get; }
+        public Dictionary<int, IHeadsetModel> HeadsetId { get; }
+    }
+}

FurnitureFactory/FurnitureFactoryDataModels/Models/ISalesSalonsModel.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace FurnitureFactoryDataModels.Models
+{
+    internal interface ISalesSalonsModel  : IId
+    {
+        string Name { get; }
+        string Address { get; }
+        public Dictionary<int, IOrdersModel> OrdersId { get; }
+    }
+}