我们来看下面的一个例子，演示如何改变线程的优先级。高优先级线程优先执行。但是不能完全保证，因为线程是高度依赖系统的。它只提高了优先级较高的线程在低优先级线程之前执行的机会。
using System
using System.Threading
public class MyThread
{
public void Thread1()
{
for(int i=0 i<3 i++)
{
Thread t = Thread.CurrentThread
Console.WriteLine(t.Name + " is running")
}
}
}
public class ThreadExample
{
public static void Main()
{
MyThread mt = new MyThread()
Thread t1 = new Thread(new ThreadStart(mt.Thread1))
Thread t2 = new Thread(new ThreadStart(mt.Thread1))
Thread t3 = new Thread(new ThreadStart(mt.Thread1))
t1.Name = "Highest-Thread "
t2.Name = "Normal-Thread "
t3.Name = "Lowest-Thread "
t1.Priority = ThreadPriority.Highest
t2.Priority = ThreadPriority.Normal
t3.Priority = ThreadPriority.Lowest
t1.Start()
t2.Start()
t3.Start()
}
}
输出是不可预测的，因为线程系统依赖性高。它可以遵循任何算法抢先或非抢占式来执行。
执行上面示例代码，得到以下结果 -
Highest-Thread is running
Normal-Thread is running
Normal-Thread is running
Normal-Thread is running
Lowest-Thread is running
Lowest-Thread is running
Lowest-Thread is running
Highest-Thread is running
Highest-Thread is running