// Entity Framework Classic

// Doc: https://entityframework-classic.net/bulk-insert

​

// @nuget: Z.EntityFramework.Classic

​

using System;

using System.Collections.Generic;

using System.Diagnostics;

using System.Data.Entity;

​

public class Program

{

    public static void Main()

    {

        var invoices = GenerateInvoices(3, 5);

        using (var context = new EntityContext())

        {

            context.BulkInsert(invoices, options => options.IncludeGraph = true);

            FiddleHelper.WriteTable("Invoice", context.Invoices);

            FiddleHelper.WriteTable("InvoiceItem", context.InvoiceItems);

        }       

    }

​

    public static List<Invoice> GenerateInvoices(int invoiceCount, int invoiceItemCount)

    {

        var list = new List<Invoice>();

        for(int i = 0; i < invoiceCount; i++)

        {

            var invoice = new Invoice() { Description = "Invoice_" + i, InvoiceItems = new List<InvoiceItem>() };

            list.Add(invoice);

            for(int j = 0; j < invoiceItemCount; j++)

            {

                invoice.InvoiceItems.Add(new InvoiceItem() { Description = "InvoiceItem_" + i + "_" + j });

            }

        }

​

        return list;

    }

​

    public class EntityContext : DbContext

    {

        public EntityContext() : base(FiddleHelper.GetConnectionStringSqlServer())

        {

​

        }

        public DbSet<Invoice> Invoices { get; set; }        

        public DbSet<InvoiceItem> InvoiceItems { get; set; }

    }

​

    public class Invoice

    {

        public int InvoiceID { get; set; }

        public string Description { get; set; }

        public List<InvoiceItem> InvoiceItems { get; set; }

    }

    public class InvoiceItem

    {

        public int InvoiceItemID { get; set; }

        public string Description { get; set; }

    }

}