C#：线程和多线程的概念

我已经在编写一些代码一段时间了。我有一个问题：

在C#中，“线程”和“多线程”是什么意思？

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线程的作用是什么？

看看这些文章，或者线程是在进程上下文中执行的一系列指令。当一个程序使用多个执行线程，允许每个线程根据分配给这些线程的优先级并发共享CPU时，就可以实现多线程

您可以参考此代码来学习线程

using System;
using System.Threading;

public class Alpha
{

   // This method that will be called when the thread is started
   public void Beta()
   {
      while (true)
      {
         Console.WriteLine("Alpha.Beta is running in its own thread.");
      }
   }
};

public class Simple
{
   public static int Main()
   {
      Console.WriteLine("Thread Start/Stop/Join Sample");

      Alpha oAlpha = new Alpha();

      // Create the thread object, passing in the Alpha.Beta method
      // via a ThreadStart delegate. This does not start the thread.
      Thread oThread = new Thread(new ThreadStart(oAlpha.Beta));

      // Start the thread
      oThread.Start();

      // Spin for a while waiting for the started thread to become
      // alive:
      while (!oThread.IsAlive);

      // Put the Main thread to sleep for 1 millisecond to allow oThread
      // to do some work:
      Thread.Sleep(1);

      // Request that oThread be stopped
      oThread.Abort();

      // Wait until oThread finishes. Join also has overloads
      // that take a millisecond interval or a TimeSpan object.
      oThread.Join();

      Console.WriteLine();
      Console.WriteLine("Alpha.Beta has finished");

      try 
      {
         Console.WriteLine("Try to restart the Alpha.Beta thread");
         oThread.Start();
      }
      catch (ThreadStateException) 
      {
         Console.Write("ThreadStateException trying to restart Alpha.Beta. ");
         Console.WriteLine("Expected since aborted threads cannot be restarted.");
      }
      return 0;
   }
} 

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