unity基础学习十七，C#高级属性：不安全代码，匿名方法（Anonymous methods）

以下是关于线程管理的详细解释和示例代码：

2.4 创建线程

线程是通过扩展 Thread 类创建的。扩展的 Thread 类调用 Start() 方法来开始子线程的执行。

using System; using System.Threading; namespace MultithreadingApplication { class ThreadCreationProgram { public static void CallToChildThread() { Console.WriteLine("Child thread starts"); } static void Main(string[] args) { ThreadStart childref = new ThreadStart(CallToChildThread); Console.WriteLine("In Main: Creating the Child thread"); Thread childThread = new Thread(childref); childThread.Start(); Console.ReadKey(); } } } 

当上面的代码被编译和执行时，它会产生下列结果：

In Main: Creating the Child thread Child thread starts 

2.5 管理线程

Thread 类提供了各种管理线程的方法。下面的实例演示了 sleep() 方法的使用，用于在一个特定的时间暂停线程。

using System; using System.Threading; namespace MultithreadingApplication { class ThreadCreationProgram { public static void CallToChildThread() { Console.WriteLine("Child thread starts"); // 线程暂停 5000 毫秒 int sleepfor = 5000; Console.WriteLine("Child Thread Paused for {0} seconds", sleepfor / 1000); Thread.Sleep(sleepfor); Console.WriteLine("Child thread resumes"); } static void Main(string[] args) { ThreadStart childref = new ThreadStart(CallToChildThread); Console.WriteLine("In Main: Creating the Child thread"); Thread childThread = new Thread(childref); childThread.Start(); Console.ReadKey(); } } } 

输出结果：

In Main: Creating the Child thread Child thread starts Child Thread Paused for 5 seconds Child thread resumes 

2.6 销毁线程

Abort() 方法用于销毁线程。通过抛出 ThreadAbortException 在运行时中止线程。这个异常不能被捕获，如果有 finally 块，控制会被送至 finally 块。

using System; using System.Threading; namespace MultithreadingApplication { class ThreadCreationProgram { public static void CallToChildThread() { try { Console.WriteLine("Child thread starts"); // 计数到 10 for (int counter = 0; counter <= 10; counter++) { Thread.Sleep(500); Console.WriteLine(counter); } Console.WriteLine("Child Thread Completed"); } catch (ThreadAbortException e) { Console.WriteLine("Thread Abort Exception"); } finally { Console.WriteLine("Couldn't catch the Thread Exception"); } } static void Main(string[] args) { ThreadStart childref = new ThreadStart(CallToChildThread); Console.WriteLine("In Main: Creating the Child thread"); Thread childThread = new Thread(childref); childThread.Start(); // 停止主线程一段时间 Thread.Sleep(2000); // 现在中止子线程 Console.WriteLine("In Main: Aborting the Child thread"); childThread.Abort(); Console.ReadKey(); } } } 

输出结果：

In Main: Creating the Child thread Child thread starts 0 1 2 In Main: Aborting the Child thread Thread Abort Exception Couldn't catch the Thread Exception