Model层的类如下:

public  class PErson    {
        public string Name {
     get;
     set;
 }
        public int Age {
     get;
     set;
 }
    }
    

PRogram.cs代码如下:

 class Program    {
            //AutoResetEvent 允许线程通过发信号互相通信。通常，此通信涉及线程需要独占访问的资源。        //线程通过调用 AutoResetEvent 上的 WaitOne 来等待信号。如果 AutoResetEvent 处于非终止状态，则该线程阻塞，并等待当前控制资源的线程,通过调用 Set 发出资源可用的信号。        //调用 Set 向 AutoResetEvent 发信号以释放等待线程。AutoResetEvent 将保持终止状态，直到一个正在等待的线程被释放，然后自动返回非终止状态。如果没有任何线程在等待，则状态将无限期地保持为终止状态。        //可以通过将一个布尔值传递给构造函数来控制 AutoResetEvent 的初始状态，如果初始状态为终止状态，则为 true；否则为 false。        //通俗的来讲只有等myResetEven.Set()成功运行后,myResetEven.WaITOne()才能够获得运行机会;
    Set是发信号，WaitOne是等待信号，只有发了信号，等待的才会执行。如果不发的话，WaitOne后面的程序就永远不会执行。        private static AutoResetEvent autoSet = new AutoResetEvent(false);
            private static ListPerson>
     list = new ListPerson>
()        {
            new Person() {
Name = "Rose", Age = 19}
,            new Person() {
Name = "Steve", Age = 45}
,            new Person() {
Name = "Jessica", Age = 20}
,        }
    ;
        private static void Main(string[] args)        {
                //CheckOrders();
                //Common();
                //RemoveFromList();
                //ExceptionHandling();
                //-----------------------------------------------------------------            //--------------------------------模拟非线程安全----------------------------            Thread t1 = new Thread(() =>
            {
                    //确保等待t2开始之后才运行下面的代码                autoSet.WaitOne();
                foreach (VAR item in list)                {
                        Console.WriteLine("t1:" + item.Name);
                        Thread.Sleep(1000);
                }
            }
    );
                t1.Start();
                Thread t2 = new Thread(() =>
            {
                    //通知t1可以执行代码                autoSet.Set();
                    //沉睡1秒是为了确保删除操作在t1的迭代过程中                Thread.Sleep(1000);
                    list.RemoveAt(2);
            }
    );
                t2.Start();
                Console.ReadKey();
        }
        public static void CheckOrders()        {
                ListOrder>
     orders = new ListOrder>
()            {
                new Order {
 Id = 123, Amount = 29.95m, CustomerName = "mark", Status = "Delivered" }
,                new Order {
 Id = 456, Amount = 45.00m, CustomerName = "Steph", Status = "Refunded" }
,                new Order {
 Id = 768, Amount = 32.50m, CustomerName = "Claire", Status = "Delivered" }
,            }
    ;
                bool anyRefunded = orders.Any(o =>
     o.Status == "Refunded");
            if (anyRefunded)            {
                    Console.WriteLine("There are refunded orders");
            }
            else            {
                    Console.WriteLine("No refunds");
            }
                bool allDelivered = orders.All(o =>
     o.Status == "Delivered");
            if (allDelivered)            {
                    Console.WriteLine("Everything was delivered");
            }
            else            {
                    Console.WriteLine("Not everything was delivered");
            }
        }
        public static void Common()        {
                //距离圣诞节的天数            var daysToChristmas = (new DateTime(DateTime.Today.Year, 12, 25) - DateTime.Today).totalDays;
                Console.WriteLine(daysToChristmas);
                //-----------------------------------------------------------------            int SUM = "10,5,0,8,10,1,4,0,10,1"                .Split(',')                .Select(int.Parse)                .OrderBy(n =>
     n)                .Skip(3)                .Sum();
                Console.WriteLine(SUM);
            //-----------------------------------------------------------------            var customers = new[] {
                new {
 Name = "Annie", Email = "annie@test.COM" }
,                new {
 Name = "Ben", Email = "" }
,                new {
 Name = "Lily", Email = "lily@test.com" }
,                new {
 Name = "Joel", Email = "joel@test.com" }
,                new {
 Name = "Sam", Email = "" }
,            }
    ;
            foreach (var customer in                from c in customers                where !String.IsNullOrEmpty(c.Email)                select c)            {
                Console.WriteLine("Sending email to {
0}
    ", customer.Name);
            }
                //效果同上            foreach (var customer in customers.Where(c =>
 !String.IsNullOrEmpty(c.Email)))            {
                Console.WriteLine("Sending email to {
0}
    ", customer.Name);
            }
        }
        public static void RemoveFroMList()        {
                FuncListstring>
    >
     makeList = () =>
     Enumerable.Range(1, 10000000).Select(n =>
     ("Item " + n + "")).ToList();
            var itemStoremove = new[] {
 "Item 0", "Item 1", "Item 50", "Item 1000", "Item 999999", "Item 9999999" }
    ;
                var stopwatch = new Stopwatch();
                var list = makeList();
                stopwatch.Start();
            foreach (var item in itemsToRemove)            {
                    list.Remove(item);
            }
                stopwatch.Stop();
            Console.WriteLine(list.Count + "Foreach took {
0}
    ms", stopwatch.ElapsedMilliseconds);
                list = makeList();
                stopwatch.Restart();
                var newList = list.Except(itemsToRemove).ToList();
     //效率极低            stopwatch.Stop();
            Console.WriteLine(newList.Count + "Except took {
0}
    ms", stopwatch.ElapsedMilliseconds);
        }
        public static void ExceptionHandling()        {
                var numbers = Enumerable.Range(1, 10)                    .Select(n =>
     5 - n)                    .Select(n =>
                    {
                        try                        {
                                return 10 / n;
                        }
                        catch (Exception e)                        {
                                Console.WriteLine("Error in lambda: " + e.Message);
                                return -1;
                        }
                    }
    );
            foreach (var n in numbers)            {
                    Console.WriteLine(n);
            }
        }
    }
    

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