using Microsoft.Extensions.DependencyInjection;

using System;

using System.Collections.Concurrent;

using System.Collections.Generic;

using System.Linq;

using System.Threading.Tasks;

using System.Threading;

using Microsoft.Extensions.Logging;

using Microsoft.EntityFrameworkCore;

​

​

class Program

    {

        static void Main(string[] args)

        {

           var services = new ServiceCollection();

           services.AddLogging(l => l.AddConsole());           

​

            services.AddDbContext<MyDBContext>(options =>

            {

                options.UseSqlServer("Server=(local);Database=MyDB;Integrated Security=True",

                    sqlServerOptions => sqlServerOptions.CommandTimeout(120));

            });

​

            var serviceProvider = services.BuildServiceProvider();

            for (int i = 1; i <= 25; i++)

            {

                using (var sp = services.BuildServiceProvider())

                {

                    using (var serviceScope = sp.CreateScope())

                    {

                        using (var accountService = serviceScope.ServiceProvider.GetService<MyDBContext>())

                        {                            

                        }

                    }

                }

            }

        }

    }

​

    public partial class MyDBContext : DbContext

    {       

        public MyDBContext(DbContextOptions<MyDBContext> options) : base(options)

        {

        }

​

        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)

        {

            if (!optionsBuilder.IsConfigured)

            {

            }

        }

​

        protected override void OnModelCreating(ModelBuilder modelBuilder)

        {

            modelBuilder.HasAnnotation("ProductVersion", "2.2.0-rtm-35687");

            OnModelCreatingExt(modelBuilder);

        }

​

        partial void OnModelCreatingExt(ModelBuilder modelBuilder);

    }

​

​