private void loginBtn_Click(object sender, EventArgs e) { if (this.phoneNumber.Text != "03001231234" && this.phoneNumber.Text.Length == 11) { SoundPlayer s = new SoundPlayer(@"..\..\Resources\New Patient.wav"); s.Play(); System.Threading.Thread.Sleep(3000); } else if (this.phoneNumber.Text.Length != 11) { SoundPlayer s = new SoundPlayer(@"..\..\Resources\Wrong Number.wav"); s.Play(); System.Threading.Thread.Sleep(3000); return; } Homepage h = new Homepage(this.phoneNumber.Text, parent); h.MdiParent = parent; h.Show(); this.phoneNumber.Text = ""; }