// Tim kiem NCC
private void guna2CircleButton1_Click(object sender, EventArgs e)
{
string tenNCC = tbTimKiem.Text;
List <NhaCungCapDTO> ListTK = new List <NhaCungCapDTO>();
List <UserNCC> listTKUser = new List <UserNCC>();
ListTK = _nhaCungCap.TimkiemNCC(tenNCC);
CreateUser(listTKUser, ListTK);
Display(listTKUser);
}