CallContext

1.线程本地存储区的专用集合对象，并提供对每个逻辑执行线程都唯一的数据槽。
2.数据槽不在其他逻辑线程上的调用上下文之间共享。

    class Program
    {
        static Jason_TestEntities Current
        {
            get
            {
                Jason_TestEntities dbContext = CallContext.LogicalGetData("CurrentContext") as Jason_TestEntities;
                if (dbContext == null)
                {
                    Console.WriteLine("重新获取DBContext" + Thread.CurrentThread.ManagedThreadId);
                    dbContext = new Jason_TestEntities();
                    dbContext.Configuration.ValidateOnSaveEnabled = false;
                    CallContext.LogicalSetData("CurrentContext", dbContext);
                }
                return dbContext;
            }
        }

        static void Main(string[] args)
        {
            for (int i = 0; i < 5; i++)
            {
                ThreadStart threadStart = new ThreadStart(select);
                Thread thread = new Thread(threadStart);
                thread.Start();
            }
            Console.WriteLine("主线程结束");
            Console.Read();
        }

        static void select()
        {
            Console.WriteLine("线程开始" + Thread.CurrentThread.ManagedThreadId);
            Current.wolf_example.Add(new wolf_example()
            {
                Name = "name" + Current.wolf_example.Count(),
                Money = Current.wolf_example.Count(),
            });
            Current.SaveChanges();
            Console.WriteLine("线程结束" + Thread.CurrentThread.ManagedThreadId);
        }
    }