public partial class FrmMain : Form
{
Thread th1;
Thread th2;
Thread th3;
public FrmMain()
{
InitializeComponent();
Form.CheckForIllegalCrossThreadCalls = false;
}
private void FrmMain_Load(object sender, EventArgs e)
{
th1 = new Thread(ChangeNumber);
th2 = new Thread(ChangeNumber);
th3 = new Thread(ChangeNumber);
th1.Start();
th2.Start();
th3.Start();
}
public void ChangeNumber()
{
lock (this)
{
while (int.Parse(this.label1.Text) > 0)
{
Thread.Sleep(1000);
this.label1.Text = (int.Parse(this.label1.Text) - 1).ToString();
}
}
}
private void FrmMain_FormClosing(object sender, FormClosingEventArgs e)
{
th1.Abort();
th2.Abort();
th3.Abort();
}
}
