اینجوری بنویس
private void Form1_Load(object sender, EventArgs e) {
timer1.Enabled = true;
timer1.Interval = 5000;
label1.Visible = false;
}
private void timer1_Tick(object sender, EventArgs e)
{
for (int i = 0; i <= timer1.Interval; )
{
if (i == timer1.Interval)
{
label1.Visible = true;
timer1.Enabled = false;
}
i++;
}
}