Label Show Intervel Time

 private void Form1_Load(object sender, EventArgs e) 
{         
   timer1.Interval = 5000;         
   timer1.Tick += new System.EventHandler(this.timer1_Tick);         
   label1.Visible = true;         
   timer1.Start(); 
}

 private void timer1_Tick(object sender, EventArgs e) 
{         
   timer1.Stop(); //If timer is not stopped, then the event will be called for every 5 seconds         
   label1.Visible = false; 
}