private void AddNewCustomer_Click(object sender, EventArgs e)
{
//Show add new customer dialog
AddCustomerForm addKhachHang = new AddCustomerForm();
addKhachHang.Show();
}
private void Addnew_LinkClicked(object sender, DevExpress.XtraNavBar.NavBarLinkEventArgs e)
{
AddCustomerForm newform = new AddCustomerForm();
newform.Show();
}