private void btnBill_Click(object sender, EventArgs e)
{
ListBill f = new ListBill();
panelLoadData.Controls.Add(f);
f.BringToFront();
}
private void buttonBill_Click(object sender, EventArgs e)
{
panelMove.Height = buttonBill.Height;
panelMove.Top = buttonBill.Top;
buttonBill.BackColor = Color.FromArgb(136, 232, 242);
//LoadData lên form
ListBill f = new ListBill();
this.panelLoadData.Controls.Add(f);
f.BringToFront();
//button trả về màu cũ khi qua button khác
buttonFood.BackColor = Color.FromArgb(5, 199, 242);
buttonHome.BackColor = Color.FromArgb(5, 199, 242);
buttonTable.BackColor = Color.FromArgb(5, 199, 242);
}