using Microsoft.EntityFrameworkCore;
using System.Collections.Generic;
using Microsoft.Data.SqlClient;
public static void Main()
using (var context = new EntityContext())
context.Database.EnsureCreated();
var customers = GenerateCustomers(5);
using (var context = new EntityContext())
context.BulkInsert(customers, options => options.ColumnInputExpression = c => new { c.CustomerID, c.Name} );
context.BulkInsert(customers, options => options.IgnoreOnInsertExpression = c => new { c.ColumnToIgnore } );
FiddleHelper.WriteTable("1 - Customers", 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, ColumnToIgnore = "Ignore_" + i });
public class EntityContext : DbContext
protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
optionsBuilder.UseSqlServer(new SqlConnection(FiddleHelper.GetConnectionStringSqlServer()));
base.OnConfiguring(optionsBuilder);
public DbSet<Customer> Customers { get; set; }
public int CustomerID { get; set; }
public string Name { get; set; }
public string ColumnToIgnore { get; set; }