大家好，我有一个代码，当我点击按钮时，按钮文本变为计时器，但它看起来毫秒，当我尝试删除它给我错误。任何帮助，我会apreciate。代码来自我在网上看到的东西，但我无法适应它。
public partial class menu : Form
{
Stopwatch cronometro = new Stopwatch();
public menu()
{
InitializeComponent();
}
private void menu_Load(object sender, EventArgs e)
{
FileStream fs2 = new FileStream(@"C:\MoldArtGestaoHoras\terminal.txt", FileMode.OpenOrCreate, FileAccess.Read);
StreamReader reader = new StreamReader(fs2);
Dados.terminal = reader.ReadToEnd();
terminal.Text = Dados.terminal;
estado.Text = "";
data.Text = DateTime.Now.ToString("dd/MM/yyyy");
hora.Text = DateTime.Now.ToString("HH:mm");
reader.Close();
}
private void setupbt_Click(object sender, EventArgs e)
{
//zerar o cronometro
cronometro.Reset();
timer1.Start();
//iniciar o cronometro
cronometro.Start();
}
private void avariabt_Click(object sender, EventArgs e)
{
}
private void pausabt_Click(object sender, EventArgs e)
{
}
private void produzirbt_Click(object sender, EventArgs e)
{
}
private void sairbt_Click(object sender, EventArgs e)
{
}
private void timer1_Tick(object sender, EventArgs e)
{
setupbt.Text = String.Format("{0:00}:{1:00}:{2:00}:{3:00}", cronometro.Elapsed.Hours, cronometro.Elapsed.Minutes, cronometro.Elapsed.Seconds, cronometro.Elapsed.Milliseconds / 10);
}
}