c#基础，单线程，跨线程访问和线程带参数

 using System;
 using System.Collections.Generic;
 using System.Threading;
 using System.Windows.Forms;

 namespace 线程和跨线程
 {
     public partial class Form1 : Form
     {
         public Form1()
         {
             InitializeComponent();
         }
         /// <summary>
         /// 单线程直接假死了
         /// </summary>
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private void btnAlone_Click(object sender, EventArgs e)
         {
             for (int i = ; i < ; i++)
             {
                 //通过[调试]-[窗口]-[输出]显示打印值
                 Console.WriteLine(i);
             }
         }

         /// <summary>
         /// 新线程运行，窗体不假死
         /// </summary>
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private void btnNew_Click(object sender, EventArgs e)
         {
             Thread th = new Thread(ShowCalculator)
             {
                 IsBackground = true
             };
             th.Start();

         }
         /// <summary>
         /// 循环计算方法，供新线程使用
         /// </summary>
         private void ShowCalculator()
         {
             for (int i = ; i < ; i++)
             {//通过[调试]-[窗口]-[输出]显示打印值
                 Console.WriteLine(i);
             }
         }
         /// <summary>
         /// 带参数的
         /// </summary>
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private void btnParameters_Click(object sender, EventArgs e)
         {
             List<int> list = new List<int>() { , , , ,  };
             ParameterizedThreadStart parThreadStart = new ParameterizedThreadStart(ShowParameters);
             Thread th = new Thread(parThreadStart) { IsBackground = true };
             th.Start(list);
         }
         private void ShowParameters(object obj)
         {
             //线程中的参数只能是Object
             List<int> result = obj as List<int>;
             foreach (var item in result)
             {
                 MessageBox.Show(item.ToString());
             }
         }
         /// <summary>
         /// 跨线程访问
         /// </summary>
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private void button1_Click(object sender, EventArgs e)
         {
             Thread th = new Thread(ShowMulti) { IsBackground = true };
             th.Start();
         }
         /// <summary>
         /// 解决跨线程访问报异常,不使用关闭跨线程检查
         /// </summary>
         private void ShowMulti()
         {
             int first = ;
             for (int i = ; i < ; i++)
             {
                 first = i;
             }
             //是否要对lbl控件进行跨线程
             if (this.lblShow.InvokeRequired)
             {
                 //对委托中的数据类型验证
                 this.lblShow.Invoke(new Action<Label, string>(ShowLableValue), this.lblShow, first.ToString());
             }
             else
             {
                 this.lblShow.Text = first.ToString();
             }
         }
         /// <summary>
         /// 把值写到控件中
         /// </summary>
         /// <param name="lbl"></param>
         /// <param name="value"></param>
         private void ShowLableValue(Label lbl, string value)
         {
             lbl.Text = value;
         }

         private void Form1_Load(object sender, EventArgs e)
         {
             //关闭跨进程检查
             //Label.CheckForIllegalCrossThreadCalls = false;
             //改用委托方法实现
         }
     }
 }