// Entity Framework Classic

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

​

// @nuget: Z.EntityFramework.Classic

​

using System.Collections.Generic;

using System.Data.Entity;

using System.Threading.Tasks;

using System.Threading;

​

public class Program

{   

    public static void Main()

    {

        MainAsync().Wait();

    }

    public static async Task MainAsync()

    {

        var customers = GenerateCustomers(5);

​

        using (var context = new EntityContext())

        {

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

            CancellationTokenSource tcs = new CancellationTokenSource();

            CancellationToken token = new CancellationToken();

            // Easy to customize

            await context.BulkInsertAsync(customers, options => options.BatchSize = 100, token);

            Thread.Sleep(1000);

            tcs.Cancel();

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

        }   

    }

    public static List<Customer> GenerateCustomers(int count) 

    {

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

        for(int i = 0; i < 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; }

    }

}