// Entity Framework Extensions

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

​

// @nuget: Microsoft.EntityFrameworkCore.SqlServer

// @nuget: Z.EntityFramework.Extensions.EFCore

​

using Microsoft.EntityFrameworkCore;

using System;

using System.Collections.Generic;

using System.Linq;

using Microsoft.Data.SqlClient;

public class Program

{

    public static void Main()

    {

        using (var context = new EntityContext())

        {

            context.Database.EnsureCreated();

        }

        // SEED  

        using (var context = new EntityContext())

        {

            for (int i = 0; i < 3; i++)

            {

                context.Models.Add(new Model { Code = (i + 10).ToString() });

            }

​

            context.SaveChanges();

        }

​

        using (var context = new EntityContext())

        {

            var listExample = new List<string> { "10" };

            // and Change on Database

            var allModels = context.Models.ToList();

            FiddleHelper.WriteTable("Models before delete", allModels);

​

            var modelsWhichShouldBeDeleted = context.Models.AsNoTracking().WhereBulkContains(listExample, x => x.Code).ToList();

            var deleted = context.Models.AsNoTracking().WhereBulkContains(listExample, x => x.Code).DeleteFromQuery();

            var modelsAfterDelete = context.Models.AsNoTracking().ToList();

            FiddleHelper.WriteTable("Models which should be deleted", modelsWhichShouldBeDeleted);

            FiddleHelper.WriteTable("Count of deleted models", deleted.ToString());

            FiddleHelper.WriteTable("Models which are now in DB after Delete", modelsAfterDelete);

        }   

    }

​

    public class EntityContext : DbContext

    {

        public EntityContext() 

        {

        }

​

        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)

        {

            optionsBuilder.UseSqlServer(new SqlConnection(FiddleHelper.GetConnectionStringSqlServer()));

​

            base.OnConfiguring(optionsBuilder);

        }

        public DbSet<Model> Models { get; set; }

    }

    public class Model 

    { 

        public int ID { get; set; }

        public string Code { get; set; } 

    }

}