ProjectConfectionaryFactory/ProjectConfectionaryFactory/Entities/Client.cs

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+namespace ProjectConfectionaryFactory.Entities;
+
+public class Client
+{
+    public int Id { get; private set; }
+    public string Name { get; private set; } = string.Empty;
+    public string Surname { get; private set; } = string.Empty;
+    public double Phone { get; private set; }
+    public string Address { get; private set; } = string.Empty;
+
+    public static Client CreateEntity(int id, string name, string surname, double phone, string address)
+    {
+        return new Client
+        {
+            Id = id,
+            Name = name ?? string.Empty,
+            Surname = surname ?? string.Empty,
+            Phone = phone,
+            Address = address ?? string.Empty,
+        };
+    }
+}

ProjectConfectionaryFactory/ProjectConfectionaryFactory/Entities/Component.cs

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+namespace ProjectConfectionaryFactory.Entities;
+
+public class Component
+{
+    public int Id { get; private set; }
+    public string Name { get; private set; } = string.Empty;
+    public double Price { get; private set; }
+    public double Weight { get; private set; }
+     
+    public static Component CreateEntity(int id, string name, double price, double weight)
+    {
+        return new Component
+        {
+            Id = id,
+            Name = name ?? string.Empty,
+            Price = price,
+            Weight = weight
+        };
+    }
+}

ProjectConfectionaryFactory/ProjectConfectionaryFactory/Entities/Product.cs

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+using ProjectConfectionaryFactory.Entities.Enums;
+
+namespace ProjectConfectionaryFactory.Entities;
+
+public class Product
+{
+    public int Id { get; private set; }
+    public ConfectionaryType ConfectionaryType { get; private set; }
+    public string Name { get; private set; } = string.Empty;
+    public double Price { get; private set; }
+    
+    public static Product CreateEntity(int id, ConfectionaryType сonfectionaryType, string name, double price)
+    {
+        return new Product
+        {
+            Id = id,
+            ConfectionaryType = сonfectionaryType,
+            Name = name ?? string.Empty,
+            Price = price
+        };
+    }
+}

ProjectConfectionaryFactory/ProjectConfectionaryFactory/Entities/Supplier.cs

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+namespace ProjectConfectionaryFactory.Entities;
+
+public class Supplier
+{
+    public int Id { get; private set; }
+    public string Name { get; private set; } = string.Empty;
+    public double Phone { get; private set; }
+    public string Address { get; private set; } = string.Empty;
+
+    public static Supplier CreateEntity(int id, string name, double phone, string address)
+    {
+        return new Supplier
+        {
+            Id = id,
+            Name = name ?? string.Empty,
+            Phone = phone,
+            Address = address ?? string.Empty
+        };
+    }
+}