【C# GDI+绘制图片问题！！！！！！】
我用Graphics 绘制图片，刚开始为什么绘制不出来呢，就是没有显示，当循环多次后台显示图片。
求解答，完整代码如下：

C# code

using System;using System.Windows.Forms;using System.Drawing;using System.Threading;namespace 多线程带参数{    class Form1 : Form    {        private PictureBox pic;        Graphics g;        private int Bit_X,Loca;        Bitmap bit;        public Form1()        {            Initialize();                }        private void Initialize()        {            pic = new PictureBox();           pic.Size = new Size(32, 48);            pic.Location = new Point(0,0);                   g = pic.CreateGraphics();            this.SuspendLayout();            this.Controls.Add(pic);            this.Size = new Size(500, 280);            this.StartPosition = FormStartPosition.CenterScreen;            this.ResumeLayout();            bit = new Bitmap("MAN.png");            Loca=Bit_X = 0;            Thread thread1 = new Thread(new ThreadStart(ManMove));            thread1.IsBackground = true;            thread1.Start();            CheckForIllegalCrossThreadCalls = false;        }        private void ManMove()        {            while (pic.Location.X < 500 - 32)            {                //bit.RotateFlip(RotateFlipType.Rotate90FlipY);                Rectangle rect = new Rectangle(Bit_X, 96, 32, 48);                Rectangle rectLoca=new Rectangle(0, 0, 32, 48);                g.DrawImage(bit, rectLoca, rect, GraphicsUnit.Pixel);                Thread.Sleep(5000);             //   Bit_X += 32;                if (Bit_X >= 192)                    Bit_X = 0;             //   g.Clear(pic.BackColor);           //     pic.Location =new Point(Loca+=5,0);            }            MessageBox.Show("Exit");        }    }}

[解决办法]
CheckForIllegalCrossThreadCalls = false;这种方式并不好还会留下隐患
声明一个开始绘制和绘制完成的事件来通知主线程