теперь точно создание моднлей данных

AbstractSushiBarDataModels/AbstractSushiBarDataModels.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.7.34031.279
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "AbstractSushiBarDataModels", "AbstractSushiBarDataModels\AbstractSushiBarDataModels.csproj", "{3CA94B77-00EA-45B6-BD88-BDD3EAD3C887}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{3CA94B77-00EA-45B6-BD88-BDD3EAD3C887}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{3CA94B77-00EA-45B6-BD88-BDD3EAD3C887}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{3CA94B77-00EA-45B6-BD88-BDD3EAD3C887}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{3CA94B77-00EA-45B6-BD88-BDD3EAD3C887}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {73292010-42D8-482B-90B6-CD302C7EA849}
+	EndGlobalSection
+EndGlobal

AbstractSushiBarDataModels/AbstractSushiBarDataModels/Enums/OrderStatus.cs

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+namespace AbstractSushiBarDataModels.Enums
+{
+    public enum OrderStatus
+    {
+        Неизвестен = -1,
+        Принят = 0,
+        Выполняется = 1,
+        Готов = 2,
+        Выдан = 3
+    }
+}

AbstractSushiBarDataModels/AbstractSushiBarDataModels/IId.cs

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+namespace AbstractSushiBarDataModels
+{
+    public interface IId
+    {
+        int Id { get; }
+    }
+}

AbstractSushiBarDataModels/AbstractSushiBarDataModels/Models/IComponentModel.cs

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+namespace AbstractSushiBarDataModels.Models
+{
+    internal interface IComponentModel : IId
+    {
+        string ComponentName { get; }
+        double Cost { get; }
+    }
+}

AbstractSushiBarDataModels/AbstractSushiBarDataModels/Models/IOrderModel.cs

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+using AbstractSushiBarDataModels.Enums;
+
+namespace AbstractSushiBarDataModels.Models
+{
+    internal interface IOrderModel : IId
+    {
+        int ProductId { get; }
+        int Count { get; }
+        double Sum { get; }
+        OrderStatus Status { get; }
+        DateTime DateCreate { get; }
+        DateTime? DateImplement { get; }
+    }
+}

AbstractSushiBarDataModels/AbstractSushiBarDataModels/Models/IProductModel.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+namespace AbstractSushiBarDataModels.Models
+{
+    internal interface IProductModel : IId
+    {
+        string ProductName { get; }
+        double Price { get; }
+        Dictionary<int, (IComponentModel, int)> ProductComponents { get; }
+    }
+}