//拉一个Timer控件到窗体,一个Label，两个Button

        Random rnd=new Random(unchecked((int)DateTime.Now.Ticks));//声明一个全局变量

        private void timer1_Tick(object sender, System.EventArgs e)//添加Timer的Tick事件
        {
            this.label1.Text=rnd.Next(1,39).ToString();
        }

        private void btnStart_Click(object sender, System.EventArgs e)//开始按钮的Click事件
        {
            this.timer1.Start();
        }

        private void btnEnd_Click(object sender, System.EventArgs e)//结束按钮的Click事件
        {
            this.timer1.Stop();
        }

------解决方案--------------------
这个要用到线程，因为你要在数字滚动的时候还可以点击按钮..

------解决方案--------------------
            Random random = new Random();
           List<int> old = new List<int>();
           for (int i = 0; i < 35; i++)
           {
               int r = random.Next(1, 35);
               while (old.Contains(r))
               {
                   r = random.Next(1, 35);
               }
               old.Add(r);
               lable.Text = r.ToString();
               Thread.Sleep(1000);
           }
           old.Clear();


------解决方案--------------------
很久很久以前做的一个双色球，拿出主要的给你看看
C# code

    private void timer2_Tick(object sender, System.EventArgs e)
        {
            Random a=new Random();
            int i1=a.Next(1,33);
            if(i1<10)
            {
                this.textBox1.Text="0"+i1.ToString();
            }
            else
            {
                this.textBox1.Text=i1.ToString();
            }
            int i2=a.Next(1,33);
            if(i2<10)
            {
                this.textBox2.Text="0"+i2.ToString();
            }
            else
            {
                this.textBox2.Text=i2.ToString();
            }
            int i3=a.Next(1,33);
            if(i3<10)
            {
                this.textBox3.Text="0"+i3.ToString();
            }
            else
            {
                this.textBox3.Text=i3.ToString();
            }
            int i4=a.Next(1,33);
            if(i4<10)
            {
                this.textBox4.Text=")"+i4.ToString();
            }
            else
            {
                this.textBox4.Text=i4.ToString();
            }
            int i5=a.Next(1,33);
            if(i5<10)
            {
                this.textBox5.Text="0"+i5.ToString();
            }
            else
            {
                this.textBox5.Text=i5.ToString();
            }
            int i6=a.Next(1,33);
            if(i6<10)
            {
                this.textBox6.Text="0"+i6.ToString();
            }
            else
            {
                this.textBox6.Text=i6.ToString();
            }
            int i7=a.Next(1,16);
            if(i7<10)
            {
                this.textBox7.Text="0"+i7.ToString();
            }
            else
            {
                this.textBox7.Text=i7.ToString();
            }
        }

------解决方案--------------------
C# code

        private void button1_Click(object sender, EventArgs e)
        {
            timer1.Start();
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            Random r = new Random();
            int t = r.Next(0, 100);
            this.label1.Text = t.ToString();
        }

        private void button2_Click(object sender, EventArgs e)