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

namespace dazi
{
    
    public partial class Form1 : Form
    {
        Label[] arry;
        int flag=0;
        int num=2;
        Random ran = new Random();

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
           
        }
        public void method()
        {
            if (arry != null)
            {
                for (int i = 0; i < arry.Length; i++)
                {
                    arry[i].Dispose();
                }
            }
            arry = new Label[num];
            for (int i = 0; i < arry.Length; i++)
            {
                
                arry[i] = new Label();
                arry[i].Visible = true;
                arry[i].Text = Convert.ToChar(ran.Next(97, 97 + 26)).ToString();
                arry[i].Font = new Font("宋体", 16);
                arry[i].Left = ran.Next(20, this.pictureBox1.Width);
             
                    this.pictureBox1.Controls.Add(arry[i]);
                
                
            }
        }

        private void btnbegin_Click(object sender, EventArgs e)
        {
            try
            {
                Thread t = new Thread(new ThreadStart(method));
                t.Start();
                Thread.Sleep(200);
                //this.method();
            }catch(Exception eqq)
            {
                MessageBox.Show(eqq.ToString());
            }
            
            for (int i = 0; i < arry.Length; i++)
            {
                arry[i].Visible = true;
            }
            this.timer1.Enabled = true;
            this.Form1_Load(sender, e);
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            for (int i = 0; i < arry.Length; i++)
            {
                arry[i].Top += 20;
                if (arry[i].Top > this.pictureBox1.Height)
                {
                    arry[i].Top = -10;
                    arry[i].Text = Convert.ToChar(ran.Next(97, 97 + 26)).ToString();
                    arry[i].Left = ran.Next(2, pictureBox1.Width - 2);
                    //this.lblfalse.Text = (Convert.ToInt32(lblfalse.Text) + 1).ToString();
                }
            }
            flag++;//累加时间
            //double t = Double.Parse(lbltrue.Text);
            //double f = Double.Parse(lblfalse.Text);
        }

        private void Form1_KeyPress(object sender, System.Windows.Forms.KeyPressEventArgs e)
        {
            
            for (int i = 0; i < arry.Length; i++)
            {
              //  e.Handled = true;
                if (e.KeyChar == Convert.ToChar(arry[i].Text))
                {
                    arry[i].Top = -10;
                    arry[i].Text = Convert.ToChar(ran.Next(97, 97 + 26)).ToString();
                    arry[i].Left = ran.Next(5,pictureBox1.Width-2);
                    //this.lbltrue.Text = (Convert.ToInt32(lbltrue.Text) + 1).ToString();
                }
            }
        }

    }
}
--------------
namespace dazi
{
    partial class Form1
    {
        /// <summary>
        /// 必需的设计器变量。
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary>
        /// 清理所有正在使用的资源。
        /// </summary>
        /// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region Windows 窗体设计器生成的代码

        /// <summary>
        /// 设计器支持所需的方法 - 不要
        /// 使用代码编辑器修改此方法的内容。
        /// </summary>
        private void InitializeComponent()
        {
            this.components = new System.ComponentModel.Container();
            this.pictureBox1 = new System.Windows.Forms.PictureBox();
            this.btnbegin = new System.Windows.Forms.Button();
            this.timer1 = new System.Windows.Forms.Timer(this.components);
            ((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).BeginInit();
            this.SuspendLayout();
            // 
            // pictureBox1
            // 
            this.pictureBox1.Location = new System.Drawing.Point(-1, 0);
            this.pictureBox1.Name = "pictureBox1";
            this.pictureBox1.Size = new System.Drawing.Size(782, 373);
            this.pictureBox1.TabIndex = 0;
            this.pictureBox1.TabStop = false;
            // 
            // btnbegin
            // 
            this.btnbegin.Location = new System.Drawing.Point(32, 395);
            this.btnbegin.Name = "btnbegin";
            this.btnbegin.Size = new System.Drawing.Size(75, 23);
            this.btnbegin.TabIndex = 1;
            this.btnbegin.Text = "begin";
            this.btnbegin.UseVisualStyleBackColor = true;
            this.btnbegin.Click += new System.EventHandler(this.btnbegin_Click);
            // 
            // timer1
            // 
            this.timer1.Tick += new System.EventHandler(this.timer1_Tick);
            // 
            // Form1
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(779, 430);
            this.Controls.Add(this.btnbegin);
            this.Controls.Add(this.pictureBox1);
            this.Name = "Form1";
            this.Text = "Form1";
            this.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.Form1_KeyPress);
            this.Load += new System.EventHandler(this.Form1_Load);
            ((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).EndInit();
            this.ResumeLayout(false);
            this.KeyPreview = true;

        }

        #endregion

        private System.Windows.Forms.PictureBox pictureBox1;
        private System.Windows.Forms.Button btnbegin;
        private System.Windows.Forms.Timer timer1;
    }
}

怎么我用线程来做会有错误呢!
在线等