关于显示随机生成数字过程

C# code

 private void button1_Click(object sender, EventArgs e)
        {
            int number;
            System.Random rd = new Random();
            for (int i = 1; i <= 3000; i++)
            {  
                //System.Threading.Thread.Sleep(10);
                number = rd.Next(500);
                if (number % 2 == 0)
                {
                    label3.ForeColor = System.Drawing.Color.Red;
                }
                else
                {
                    label3.ForeColor = System.Drawing.Color.Blue;
                }
                label3.Text = number.ToString();
            }

        }

很显然，这里只能显示最后结果，能不能变随机变显示，

窗体上拖一个label控件、一个Timer控件，设置Timer控件的Enable为true、Interval为1000，双击Timer控件，编写事件代码：
C# code

        private void timer1_Tick(object sender, EventArgs e)
        {

            System.Random rd = new Random();
            int number = rd.Next(500);
            if (number % 2 == 0)
                label1.ForeColor = System.Drawing.Color.Red;
            else
                label1.ForeColor = System.Drawing.Color.Blue;
            label1.Text = number.ToString();
        }

private void button1_Click(object sender, EventArgs e)
  {
  int number;
  System.Random rd = new Random();
  for (int i = 1; i <= 3000; i++)
  {  
  //System.Threading.Thread.Sleep(10);
  number = rd.Next(500);
  if (number % 2 == 0)
  {
  label3.ForeColor = System.Drawing.Color.Red;
  }
  else
  {
  label3.ForeColor = System.Drawing.Color.Blue;
  }
  label3.Text += number.ToString();
  }

  }

C# code

   private void button1_Click(object sender, EventArgs e)
        {

            timer1.Enabled = true;
            timer1.Start();
}

 private void timer1_Tick(object sender, EventArgs e)
        {
            int number;
            System.Random rd = new Random();
            number = rd.Next(500);
            if (number % 2 == 0)
            {
                label3.ForeColor = System.Drawing.Color.Red;
            }
            else
            {
                label3.ForeColor = System.Drawing.Color.Blue;
            }
            label3.Text = number.ToString();


        }