namespace ConsoleApplication2
{
    class Person
    {
        public int Id { get; set; }
        public string Name { get; set; }
        public int Age { get; set; }
        public string Class { get; set; }
        public int Height { get; set; }
        public int Weight { get; set; }
        public string Description { get; set; }
    }
    class MyDbContext : DbContext
    {
        public MyDbContext()
            : base("default") { }
        public DbSet<Person> Person { get; set; }
    }
    class Program
    {
        static void Main(string[] args)
        {
            List<Task> ts = new List<Task>();
            for (int i = 0; i < 2000; i++)
            {
                Task task = new Task(() =>
                {
                    //Thread.Sleep(1000);
                    MyDbContext db2 = new MyDbContext();
                    using (db2)
                    {
                        var res1 = db2.Person.Where(u => u.Id < 10).ToList();
                        var p = new Person { Name = "ThreadOne", Description = "ThreadOne" };
                        db2.Person.Add(p);
                        db2.SaveChanges();
                        //db2.Dispose();
                    }
                });
                string state = "Complete" + i;
                task.ContinueWith(u => { Console.WriteLine(state); });
                ts.Add(task);
            }
            ts.AsParallel<Task>().ForAll(u => { u.Start(); });
            Console.ReadKey();
        }
    }
}