c#之双色球

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 摇奖机程序
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        bool b = false;
        private void button1_Click(object sender, EventArgs e)
        {
            if (b == false)
            {
               
                b = true;
                int num = int.Parse(this.textBox1.Text);
                button1.Text = "停止";
                Thread th = new Thread(PlayGame);
                th.IsBackground = true;
                th.Name = "新线程";
                // th.
                th.Start(num);
            }
            else//b==true
            {
                b = false;
                button1.Text = "开始";
            }
            //PlayGame();
        }
        private void PlayGame(object ss)
        {
            Random r = new Random();
            while (b)
            {
                listBox1.Items.Clear();
                int num = (int)ss;
                for (int i = 0; i < num; i++) 
                {
                    //int[] nums = new int[6];
                    List<int> nums = new List<int>();
                    for (int j = 0; j < 6; j++) 
                    {
                        int cu = r.Next(1, 34);
                        if (nums.Contains(cu))
                        {
                            j--;
                        }
                        else 
                        {
                            nums.Add(cu);
                        }
                    }

                    nums.Sort();
                    int lan=r.Next(1,17);
                    string zu = nums[0].ToString() + " " + nums[1].ToString() + " " + nums[2].ToString() + " " + nums[3].ToString() + " " + nums[4].ToString() + " " + nums[5].ToString() + "-" + lan;
                    listBox1.Items.Add(zu);

                    
                  
                }


            }
        }

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

    }
}