private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
{
  if (e.KeyChar == '\r')
  {
     a[i] = Convert.ToInt32(textBox1.Text);
     i++;
     if (i < count)
     {
        textBox1.Text = "";
        textBox1.Focus();
        label1.Text = "Number " +Convert.ToString(i + 1, 10);
     }
     else
     {
        i = 0;
        label1.Text = "Number " + Convert.ToString(i + 1, 10);
        MessageBox.Show(" Please Clicked Max Button");
        Max.Enabled = true;
     }
}
