c#线程创建

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Threading;

namespace WindowsFormsApplication2
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
Thread th;
private void button1_Click(object sender, EventArgs e)
{
th = new Thread(test);
th.IsBackground = true;
th.Start();

}

private void test()
{
int n = 100000;
this.textBox1.Text = Convert.ToString((1 + n) * n / 2);

}

private void Form1_Load(object sender, EventArgs e)
{
Control.CheckForIllegalCrossThreadCalls = false;
}

private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{

if (th != null)
{
th.Abort();
}
}
}
}