using System;

 using System.Collections.Generic;

 using System.ComponentModel;

 using System.Data;

 using System.Drawing;

 using System.Linq;

 using System.Text;

 using System.Threading.Tasks;

 using System.Windows.Forms;

 using System.Threading;

 namespace picture_0

 {

     public partial class Form1 : Form

     {

         public Form1()

         {

             InitializeComponent();

         }

 Thread th;

         private void Form1_Load(object sender, EventArgs e)

         {

              th = new Thread

                 (

                     delegate ()

                     {

                         for (int i = ; i < ; i++)

                         {

                             ChangeImage(Image.FromFile(@"picture\18720223738_6b6c58f282_o.jpg"), );

                             ChangeImage(Image.FromFile(@"picture\amargosa-river-stars.jpg"), );

                         }

                     }

                 );

             th.IsBackground = true;

             th.Start();

         }

      private void Form1_FormClosed(object sender, FormClosedEventArgs e)

         {

             th.Abort();//结束线程

         }

         private void ChangeImage(Image img, int millisecondsTimeOut)

         {

             this.Invoke(new Action(() =>

             {

                 pictureBox1.Image = img;

             })

                 );

             Thread.Sleep(millisecondsTimeOut);

         }

     }

 }