private void btnCameras_Click(object sender, EventArgs e)
{
this.Hide();
CamerasForm form = new CamerasForm();
form.Closed += (s, args) => this.Close();
form.Show();
}
private void btnCameras_Click(object sender, EventArgs e)
{
this.Visible = false;
CamerasForm form = new CamerasForm();
form.Closed += (s, args) => this.Visible = true;
//form.RemainingTime = TimeLimit - new TimeSpan(0, 0, 0, 0, PlayTime);
form.Show();
}