// Entity Framework Classic

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

​

// @nuget: Z.EntityFramework.Classic

​

​

using System.Data.Entity;

using System.Linq;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        var customers1 = GenerateCustomers(0, 5);

        var customers2 = GenerateCustomers(5, 5);

        using (var context = new EntityContext())

        {

            FiddleHelper.WriteTable("1 - Customers Before", context.Customers);

            // Easy to use

            context.BulkInsert(customers1);

            // Easy to customize

            context.BulkInsert(customers2, options => options.BatchSize = 100);

            FiddleHelper.WriteTable("2 - Customers After", context.Customers);

        }   

    }

    public static List<Customer> GenerateCustomers(int start, int count) 

    {

        List<Customer>  list = new List<Customer>();

        for(int i = start; i < start + count; i++)

        {

            list.Add(new Customer() { Name ="Customer_" + i});

        }

        return list;

    }

​

    public class EntityContext : DbContext

    {

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

        {

​

        }

        public DbSet<Customer> Customers { get; set; }

    }

    public class Customer

    {

        public int CustomerID { get; set; }

        public string Name { get; set; }

    }

}