C# 中 HashSet 元素数量是多少?
csharpserver side programmingprogramming更新于 2025/8/9 13:52:17
检查一个线程是否为后台线程，代码如下:−
示例
using System;
using System.Threading;
public class Demo {
public static void Main() {
Thread thread = new Thread(new ThreadStart(demo1));
ThreadPool.QueueUserWorkItem(new WaitCallback(demo2));
Console.WriteLine("Current state of Thread = "+thread.ThreadState);
Console.WriteLine("ManagedThreadId = "+thread.ManagedThreadId);
Console.WriteLine("Is the Thread a background thread? = "+Thread.CurrentThread.IsBackground);
}
public static void demo1() {
Thread.Sleep(2000);
}
public static void demo2(object stateInfo) {
Console.WriteLine("Thread belongs to managed thread pool? = "+Thread.CurrentThread.IsThreadPoolThread);
}
}
输出
这将产生以下输出 −
Current state of Thread = Unstarted ManagedThreadId = 721 Is the Thread a background thread? = False Thread belongs to managed thread pool? = True
示例
让我们看另一个例子 −
using System;
using System.Threading;
public class Demo {
public static void Main() {
Thread thread = new Thread(new ThreadStart(demo1));
ThreadPool.QueueUserWorkItem(new WaitCallback(demo2));
Console.WriteLine("Current state of Thread = "+thread.ThreadState);
Console.WriteLine("ManagedThreadId = "+thread.ManagedThreadId);
thread.IsBackground = true;
Console.WriteLine("Is the Thread a background thread? = "+thread.IsBackground);
}
public static void demo1() {
Thread.Sleep(2000);
}
public static void demo2(object stateInfo) {
Console.WriteLine("Thread belongs to managed thread pool? = "+Thread.CurrentThread.IsThreadPoolThread);
}
}
输出
这将产生以下输出 −
Current state of Thread = Unstarted ManagedThreadId = 1114 Is the Thread a background thread? = True Thread belongs to managed thread pool? = True
