diff --git a/ComputerHardwareStore/ComputerHardwareStoreDatabaseImplement/Migrations/ComputerHardwareStoreDBContextModelSnapshot.cs b/ComputerHardwareStore/ComputerHardwareStoreDatabaseImplement/Migrations/ComputerHardwareStoreDBContextModelSnapshot.cs
new file mode 100644
index 0000000..2074f70
--- /dev/null
+++ b/ComputerHardwareStore/ComputerHardwareStoreDatabaseImplement/Migrations/ComputerHardwareStoreDBContextModelSnapshot.cs
@@ -0,0 +1,544 @@
+// <auto-generated />
+using System;
+using ComputerHardwareStoreDatabaseImplement;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace ComputerHardwareStoreDatabaseImplement.Migrations
+{
+    [DbContext(typeof(ComputerHardwareStoreDBContext))]
+    partial class ComputerHardwareStoreDBContextModelSnapshot : ModelSnapshot
+    {
+        protected override void BuildModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "8.0.4")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("ComputerHardwareStoreDatabaseImplement.Models.Build", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<double>("Price")
+                        .HasColumnType("double precision");
+
+                    b.Property<int>("VendorId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("VendorId");
+
+                    b.ToTable("Builds");
+                });
+
+            modelBuilder.Entity("ComputerHardwareStoreDatabaseImplement.Models.BuildComponent", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("BuildId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("ComponentId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("Count")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("BuildId");
+
+                    b.HasIndex("ComponentId");
+
+                    b.ToTable("BuildComponents");
+                });
+
+            modelBuilder.Entity("ComputerHardwareStoreDatabaseImplement.Models.Comment", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("BuildId")
+                        .HasColumnType("integer");
+
+                    b.Property<DateTime>("Date")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<string>("Text")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("BuildId");
+
+                    b.ToTable("Comments");
+                });
+
+            modelBuilder.Entity("ComputerHardwareStoreDatabaseImplement.Models.Component", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<double>("Cost")
+                        .HasColumnType("double precision");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("StoreKeeperId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("StoreKeeperId");
+
+                    b.ToTable("Components");
+                });
+
+            modelBuilder.Entity("ComputerHardwareStoreDatabaseImplement.Models.Order", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<DateTime>("DateCreate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<DateTime?>("DateImplement")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<int>("Status")
+                        .HasColumnType("integer");
+
+                    b.Property<double>("Sum")
+                        .HasColumnType("double precision");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Orders");
+                });
+
+            modelBuilder.Entity("ComputerHardwareStoreDatabaseImplement.Models.OrderProduct", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("Count")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("OrderId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("ProductId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("OrderId");
+
+                    b.HasIndex("ProductId");
+
+                    b.ToTable("OrderProducts");
+                });
+
+            modelBuilder.Entity("ComputerHardwareStoreDatabaseImplement.Models.Product", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<double>("Price")
+                        .HasColumnType("double precision");
+
+                    b.Property<int?>("StoreKeeperId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("StoreKeeperId");
+
+                    b.ToTable("Products");
+                });
+
+            modelBuilder.Entity("ComputerHardwareStoreDatabaseImplement.Models.ProductComponent", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("ComponentId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("Count")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("ProductId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ComponentId");
+
+                    b.HasIndex("ProductId");
+
+                    b.ToTable("ProductComponents");
+                });
+
+            modelBuilder.Entity("ComputerHardwareStoreDatabaseImplement.Models.Purchase", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<double>("Cost")
+                        .HasColumnType("double precision");
+
+                    b.Property<DateTime>("DateCreate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<DateTime?>("DateImplement")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<int>("VendorId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("VendorId");
+
+                    b.ToTable("Purchases");
+                });
+
+            modelBuilder.Entity("ComputerHardwareStoreDatabaseImplement.Models.PurchaseBuild", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("BuildId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("Count")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("PurchaseId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("BuildId");
+
+                    b.HasIndex("PurchaseId");
+
+                    b.ToTable("PurchaseBuilds");
+                });
+
+            modelBuilder.Entity("ComputerHardwareStoreDatabaseImplement.Models.PurchaseProduct", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("Count")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("ProductId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("PurchaseId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ProductId");
+
+                    b.HasIndex("PurchaseId");
+
+                    b.ToTable("PurchaseProducts");
+                });
+
+            modelBuilder.Entity("ComputerHardwareStoreDatabaseImplement.Models.StoreKeeper", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Login")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Password")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("StoreKeepers");
+                });
+
+            modelBuilder.Entity("ComputerHardwareStoreDatabaseImplement.Models.Vendor", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Login")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Password")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Vendors");
+                });
+
+            modelBuilder.Entity("ComputerHardwareStoreDatabaseImplement.Models.Build", b =>
+                {
+                    b.HasOne("ComputerHardwareStoreDatabaseImplement.Models.Vendor", "Vendor")
+                        .WithMany("Builds")
+                        .HasForeignKey("VendorId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Vendor");
+                });
+
+            modelBuilder.Entity("ComputerHardwareStoreDatabaseImplement.Models.BuildComponent", b =>
+                {
+                    b.HasOne("ComputerHardwareStoreDatabaseImplement.Models.Build", "Build")
+                        .WithMany("Components")
+                        .HasForeignKey("BuildId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("ComputerHardwareStoreDatabaseImplement.Models.Component", "Component")
+                        .WithMany()
+                        .HasForeignKey("ComponentId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Build");
+
+                    b.Navigation("Component");
+                });
+
+            modelBuilder.Entity("ComputerHardwareStoreDatabaseImplement.Models.Comment", b =>
+                {
+                    b.HasOne("ComputerHardwareStoreDatabaseImplement.Models.Build", "Build")
+                        .WithMany()
+                        .HasForeignKey("BuildId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Build");
+                });
+
+            modelBuilder.Entity("ComputerHardwareStoreDatabaseImplement.Models.Component", b =>
+                {
+                    b.HasOne("ComputerHardwareStoreDatabaseImplement.Models.StoreKeeper", "StoreKeeperЗЛ")
+                        .WithMany("Components")
+                        .HasForeignKey("StoreKeeperId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("StoreKeeperЗЛ");
+                });
+
+            modelBuilder.Entity("ComputerHardwareStoreDatabaseImplement.Models.OrderProduct", b =>
+                {
+                    b.HasOne("ComputerHardwareStoreDatabaseImplement.Models.Order", "Order")
+                        .WithMany("Products")
+                        .HasForeignKey("OrderId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("ComputerHardwareStoreDatabaseImplement.Models.Product", "Product")
+                        .WithMany()
+                        .HasForeignKey("ProductId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Order");
+
+                    b.Navigation("Product");
+                });
+
+            modelBuilder.Entity("ComputerHardwareStoreDatabaseImplement.Models.Product", b =>
+                {
+                    b.HasOne("ComputerHardwareStoreDatabaseImplement.Models.StoreKeeper", null)
+                        .WithMany("Products")
+                        .HasForeignKey("StoreKeeperId");
+                });
+
+            modelBuilder.Entity("ComputerHardwareStoreDatabaseImplement.Models.ProductComponent", b =>
+                {
+                    b.HasOne("ComputerHardwareStoreDatabaseImplement.Models.Component", "Component")
+                        .WithMany("ProductComponents")
+                        .HasForeignKey("ComponentId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("ComputerHardwareStoreDatabaseImplement.Models.Product", "Product")
+                        .WithMany("Components")
+                        .HasForeignKey("ProductId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Component");
+
+                    b.Navigation("Product");
+                });
+
+            modelBuilder.Entity("ComputerHardwareStoreDatabaseImplement.Models.Purchase", b =>
+                {
+                    b.HasOne("ComputerHardwareStoreDatabaseImplement.Models.Vendor", null)
+                        .WithMany("Purchases")
+                        .HasForeignKey("VendorId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("ComputerHardwareStoreDatabaseImplement.Models.PurchaseBuild", b =>
+                {
+                    b.HasOne("ComputerHardwareStoreDatabaseImplement.Models.Build", "Build")
+                        .WithMany()
+                        .HasForeignKey("BuildId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("ComputerHardwareStoreDatabaseImplement.Models.Purchase", "Purchase")
+                        .WithMany("Builds")
+                        .HasForeignKey("PurchaseId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Build");
+
+                    b.Navigation("Purchase");
+                });
+
+            modelBuilder.Entity("ComputerHardwareStoreDatabaseImplement.Models.PurchaseProduct", b =>
+                {
+                    b.HasOne("ComputerHardwareStoreDatabaseImplement.Models.Product", "Product")
+                        .WithMany()
+                        .HasForeignKey("ProductId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("ComputerHardwareStoreDatabaseImplement.Models.Purchase", "Purchase")
+                        .WithMany("Products")
+                        .HasForeignKey("PurchaseId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Product");
+
+                    b.Navigation("Purchase");
+                });
+
+            modelBuilder.Entity("ComputerHardwareStoreDatabaseImplement.Models.Build", b =>
+                {
+                    b.Navigation("Components");
+                });
+
+            modelBuilder.Entity("ComputerHardwareStoreDatabaseImplement.Models.Component", b =>
+                {
+                    b.Navigation("ProductComponents");
+                });
+
+            modelBuilder.Entity("ComputerHardwareStoreDatabaseImplement.Models.Order", b =>
+                {
+                    b.Navigation("Products");
+                });
+
+            modelBuilder.Entity("ComputerHardwareStoreDatabaseImplement.Models.Product", b =>
+                {
+                    b.Navigation("Components");
+                });
+
+            modelBuilder.Entity("ComputerHardwareStoreDatabaseImplement.Models.Purchase", b =>
+                {
+                    b.Navigation("Builds");
+
+                    b.Navigation("Products");
+                });
+
+            modelBuilder.Entity("ComputerHardwareStoreDatabaseImplement.Models.StoreKeeper", b =>
+                {
+                    b.Navigation("Components");
+
+                    b.Navigation("Products");
+                });
+
+            modelBuilder.Entity("ComputerHardwareStoreDatabaseImplement.Models.Vendor", b =>
+                {
+                    b.Navigation("Builds");
+
+                    b.Navigation("Purchases");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}
diff --git a/ComputerHardwareStore/ComputerHardwareStoreDatabaseImplement/Models/Build.cs b/ComputerHardwareStore/ComputerHardwareStoreDatabaseImplement/Models/Build.cs
new file mode 100644
index 0000000..5b2ae2d
--- /dev/null
+++ b/ComputerHardwareStore/ComputerHardwareStoreDatabaseImplement/Models/Build.cs
@@ -0,0 +1,87 @@
+using ComputerHardwareStoreContracts.BindingModels;
+using ComputerHardwareStoreContracts.ViewModels;
+using ComputerHardwareStoreDataModels.Models;
+using Microsoft.EntityFrameworkCore.Metadata.Internal;
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace ComputerHardwareStoreDatabaseImplement.Models
+{
+    public class Build : IBuildModel
+    {
+        public int Id { get; set; }
+        [Required]
+        public string Name { get; set; } = string.Empty;
+        [Required]
+        public double Price { get; set; }
+        [NotMapped]
+        private Dictionary<int, (IComponentModel, int)>? _buildComponents = null;
+        [NotMapped]
+        public Dictionary<int, (IComponentModel, int)> BuildComponents
+        {
+            get
+            {
+                if (_buildComponents == null)
+                {
+                    _buildComponents = Components
+                        .ToDictionary(bc => bc.ComponentId, bc =>
+                        (bc.Component as IComponentModel, bc.Count));
+                }
+                return _buildComponents;
+            }   
+        }
+        [ForeignKey("BuildId")]
+        public virtual List<BuildComponent> Components { get; set; } = new();
+        [ForeignKey("BuildId")]
+        public virtual List<Comment> Comments { get; set; } = new();
+        [NotMapped]
+        List<ICommentModel> IBuildModel.Comments => Comments.Select(c => c as ICommentModel).ToList();
+
+        public virtual Vendor Vendor { get; private set; } = new();
+        IVendorModel IBuildModel.Vendor => Vendor as IVendorModel;
+
+        public static Build? Create(ComputerHardwareStoreDBContext context, BuildBindingModel model)
+        {
+            if (model == null)
+            {
+                return null;
+            }
+            return new()
+            {
+                Id = model.Id,
+                Name = model.Name,
+                Price = model.Price,
+                Vendor = context.Vendors.First(v => v.Id == model.Vendor.Id),
+                Components = context.Components
+                    .Where(c => model.BuildComponents.ContainsKey(c.Id))
+                    .Select(c => new BuildComponent()
+                    {
+                        BuildId = model.Id,
+                        ComponentId = c.Id,
+                        Component = c,
+                        Count = model.BuildComponents[c.Id].Item2
+                    }).ToList()
+            };
+        }
+
+        public void Update(BuildBindingModel model)
+        {
+            if (model == null)
+            {
+                return;
+            }
+            Name = string.IsNullOrEmpty(model.Name) ? Name : model.Name;
+            Price = model.Price;
+        }
+
+        public BuildViewModel GetViewModel => new()
+        {
+            Id = Id,
+            Name = Name,
+            Price = Price,
+            Vendor = Vendor,
+            Comments = Comments.Select(c => c as ICommentModel).ToList(),
+            BuildComponents = BuildComponents
+        };
+    }
+}
diff --git a/ComputerHardwareStore/ComputerHardwareStoreDatabaseImplement/Models/Comment.cs b/ComputerHardwareStore/ComputerHardwareStoreDatabaseImplement/Models/Comment.cs
new file mode 100644
index 0000000..98e165c
--- /dev/null
+++ b/ComputerHardwareStore/ComputerHardwareStoreDatabaseImplement/Models/Comment.cs
@@ -0,0 +1,49 @@
+using ComputerHardwareStoreContracts.BindingModels;
+using ComputerHardwareStoreContracts.ViewModels;
+using ComputerHardwareStoreDataModels.Models;
+using System.ComponentModel.DataAnnotations;
+
+namespace ComputerHardwareStoreDatabaseImplement.Models
+{
+    public class Comment : ICommentModel
+    {
+        public int Id { get; set; }
+        [Required]
+        public DateTime Date { get; set; }
+        [Required]
+        public string Text { get; set; } = string.Empty;
+        [Required]
+        public int BuildId { get; set; }
+        public virtual Build Build { get; set; } = new();
+        public static Comment? Create(CommentBindingModel model)
+        {
+            if (model == null)
+            {
+                return null;
+            }
+            return new()
+            {
+                Id = model.Id,
+                Date = model.Date,
+                Text = model.Text,
+                BuildId = model.BuildId,
+            };
+        }
+
+        public void Update(CommentBindingModel model)
+        {
+            if (model == null)
+            {
+                return;
+            }
+            Text = model.Text;
+        }
+
+        public CommentViewModel GetViewModel => new()
+        {
+            Id = Id,
+            Date = Date,
+            Text = Text,
+        };
+    }
+}
diff --git a/ComputerHardwareStore/ComputerHardwareStoreDatabaseImplement/Models/Order.cs b/ComputerHardwareStore/ComputerHardwareStoreDatabaseImplement/Models/Order.cs
new file mode 100644
index 0000000..b03e97e
--- /dev/null
+++ b/ComputerHardwareStore/ComputerHardwareStoreDatabaseImplement/Models/Order.cs
@@ -0,0 +1,82 @@
+using ComputerHardwareStoreContracts.BindingModels;
+using ComputerHardwareStoreContracts.ViewModels;
+using ComputerHardwareStoreDataModels.Enums;
+using ComputerHardwareStoreDataModels.Models;
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace ComputerHardwareStoreDatabaseImplement.Models
+{
+    public class Order : IOrderModel
+    {
+        public int Id { get; private set; }
+        [Required]
+        public double Sum { get; set; }
+        [Required]
+        public OrderStatus Status { get; set; } = OrderStatus.Неизвестен;
+        [Required]
+        public DateTime DateCreate { get; set; } = DateTime.Now;
+        public DateTime? DateImplement { get; set; }
+
+        private Dictionary<int, (IProductModel, int)>? _orderProducts = null;
+        [NotMapped]
+        public Dictionary<int, (IProductModel, int)> OrderProducts 
+        {
+            get
+            {
+                if (_orderProducts == null)
+                {
+                    _orderProducts = Products
+                        .ToDictionary(
+                            op => op.ProductId, 
+                            op => (op.Product as IProductModel, op.Count));
+                }
+                return _orderProducts;
+            }
+        }
+        [ForeignKey("OrderId")]
+        public virtual List<OrderProduct> Products { get; set; } = new();
+        public static Order? Create(ComputerHardwareStoreDBContext context, OrderBindingModel model)
+        {
+            if (model == null)
+            {
+                return null;
+            }
+            return new Order()
+            {
+                Id = model.Id,
+                Sum = model.Sum,
+                Status = model.Status,
+                DateCreate = model.DateCreate,
+                DateImplement = model.DateImplement,
+                Products = context.Products
+                    .Where(p => model.OrderProducts.ContainsKey(p.Id))
+                    .Select(p => new OrderProduct()
+                    {
+                        OrderId = model.Id,
+                        ProductId = p.Id,
+                        Product = p,
+                        Count = model.OrderProducts[p.Id].Item2
+                    })
+                    .ToList()
+            };
+        }
+        public void Update(OrderBindingModel model)
+        {
+            if (model == null)
+            {
+                return;
+            }
+            Status = model.Status;
+            DateImplement = model.DateImplement;
+        }
+        public OrderViewModel GetViewModel => new()
+        {
+            Id = Id,
+            Sum = Sum,
+            Status = Status,
+            DateCreate = DateCreate,
+            DateImplement = DateImplement,
+        };
+    }
+}
\ No newline at end of file
diff --git a/ComputerHardwareStore/ComputerHardwareStoreDatabaseImplement/Models/Product.cs b/ComputerHardwareStore/ComputerHardwareStoreDatabaseImplement/Models/Product.cs
new file mode 100644
index 0000000..c995ce7
--- /dev/null
+++ b/ComputerHardwareStore/ComputerHardwareStoreDatabaseImplement/Models/Product.cs
@@ -0,0 +1,96 @@
+using ComputerHardwareStoreContracts.BindingModels;
+using ComputerHardwareStoreContracts.ViewModels;
+using ComputerHardwareStoreDataModels.Models;
+using Microsoft.EntityFrameworkCore;
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace ComputerHardwareStoreDatabaseImplement.Models
+{
+    public class Product : IProductModel
+    {
+        public int Id { get; set; }
+        [Required]
+        public string Name { get; set; } = string.Empty;
+        [Required]
+        public double Price { get; set; }
+        private Dictionary<int, (IComponentModel, int)>? _productComponents = null;
+        [NotMapped]
+        public Dictionary<int, (IComponentModel, int)> ProductComponents
+        {
+            get
+            {
+                if (_productComponents == null)
+                {
+                    _productComponents = Components
+                        .ToDictionary(c => c.ComponentId, c => (c.Component as IComponentModel, c.Count));
+                }
+                return _productComponents;
+            }
+        }
+        [ForeignKey("ProductId")]
+        public virtual List<ProductComponent> Components { get; set; } = new();
+        public static Product Create(ComputerHardwareStoreDBContext context, ProductBindingModel model)
+        {
+            return new Product()
+            {
+                Id = model.Id,
+                Name = model.Name,
+                Price = model.Price,
+                Components = context.Components
+                    .Where(c => model.ProductComponents.ContainsKey(c.Id))
+                    .Select(c => new ProductComponent()
+                    {
+                        ProductId = model.Id,
+                        ComponentId = c.Id,
+                        Component = c,
+                        Count = model.ProductComponents[c.Id].Item2
+                    }).ToList(),
+            };
+        }
+        public void Update(ProductBindingModel model)
+        {
+            Name = string.IsNullOrEmpty(model.Name) ? Name : model.Name;
+            Price = model.Price;
+            
+        }
+        public ProductViewModel GetViewModel => new()
+        {
+            Id = Id,
+            Name = Name,
+            Price = Price,
+            ProductComponents = ProductComponents
+        };
+
+        public static void UpdateComponents(ComputerHardwareStoreDBContext context, ProductBindingModel model)
+        {
+            var productComponents = context.ProductComponents
+                .Where(pc => pc.ProductId == model.Id)
+                .ToList();
+            if (productComponents.Count != 0 && productComponents.Count > 0)
+            {
+                // удалили те, которых нет в модели
+                context.ProductComponents
+                    .Where(pc => !model.ProductComponents.ContainsKey(pc.ComponentId))
+                    .ExecuteDelete();
+                // обновили количество у существующих записей
+                productComponents
+                    .ForEach(updateComponent =>
+                    {
+                        updateComponent.Count = model.ProductComponents[updateComponent.ComponentId].Item2;
+                        model.ProductComponents.Remove(updateComponent.ComponentId);
+                    });  
+            }
+            // добавили новые
+            context.ProductComponents
+                .AddRange(model.ProductComponents.Values
+                .Select(val => new ProductComponent()
+                {
+                    ProductId = model.Id,
+                    ComponentId = val.Item1.Id,
+                    Count = val.Item2
+                }));
+            context.SaveChanges();
+        }
+    }
+}
diff --git a/ComputerHardwareStore/ComputerHardwareStoreREST/ComputerHardwareStoreREST.csproj b/ComputerHardwareStore/ComputerHardwareStoreREST/ComputerHardwareStoreREST.csproj
new file mode 100644
index 0000000..8777ec2
--- /dev/null
+++ b/ComputerHardwareStore/ComputerHardwareStoreREST/ComputerHardwareStoreREST.csproj
@@ -0,0 +1,26 @@
+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="8.0.4">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="8.0.4">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+    <PackageReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Design" Version="8.0.2" />
+    <PackageReference Include="Swashbuckle.AspNetCore" Version="6.4.0" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\ComputerHardwareStoreDatabaseImplement\ComputerHardwareStoreDatabaseImplement.csproj" />
+  </ItemGroup>
+
+</Project>
diff --git a/ComputerHardwareStore/ComputerHardwareStoreREST/Program.cs b/ComputerHardwareStore/ComputerHardwareStoreREST/Program.cs
new file mode 100644
index 0000000..fb6235b
--- /dev/null
+++ b/ComputerHardwareStore/ComputerHardwareStoreREST/Program.cs
@@ -0,0 +1,41 @@
+using ComputerHardwareStoreContracts.StorageContracts;
+using ComputerHardwareStoreDatabaseImplement;
+using ComputerHardwareStoreDatabaseImplement.Implements;
+using ComputerHardwareStoreREST;
+using Microsoft.EntityFrameworkCore;
+
+var builder = WebApplication.CreateBuilder(args);
+
+// Add services to the container.
+
+builder.Services.AddControllers();
+// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
+builder.Services.AddEndpointsApiExplorer();
+builder.Services.AddSwaggerGen();
+
+// получаем строку подключения из файла конфигурации
+//DBSetting.ConectionString = builder.Configuration.GetConnectionString("DefaultConnection");
+
+builder.Services.AddSingleton<IComponentStorage, ComponentStorage >();
+builder.Services.AddSingleton<IStoreKeeperStorage, StoreKeeperStorage>();
+builder.Services.AddSingleton<IProductStorage, ProductStorage>();
+builder.Services.AddSingleton<IOrderStorage, OrderStorage>();
+builder.Services.AddSingleton<IBuildStorage, BuildStorage>();
+builder.Services.AddSingleton<ICommentStorage, CommentStorage>();
+builder.Services.AddSingleton<IPurchaseStorage, PurchaseStorage>();
+builder.Services.AddSingleton<IVendorStorage, VendorStorage>();
+
+var app = builder.Build();
+
+// Configure the HTTP request pipeline.
+if (app.Environment.IsDevelopment())
+{
+    app.UseSwagger();
+    app.UseSwaggerUI();
+}
+
+app.UseAuthorization();
+
+app.MapControllers();
+
+app.Run();