How to assign a result from grouping to listbox or datagridview in winforms?

 using (NORTHWNDEntities baza = new NORTHWNDEntities())
    {
    var score = from customers in dataBase.Customers
                                group customers by customers .Country.ToUpper()
                                into sort
                                orderby sort.Key
                                select sort;
    foreach (var group in score )
                    {
                        Convert.ToString(group.Key);

                        foreach (var item in grupa)
                        {
                            var row = Convert.ToString(item.CompanyName) +               " : "
                             + Convert.ToString(item.Phone) + " : "
                             + Convert.ToString(item.Address);

                        }
                    }
     dataGridView1.DataSource = ???
     '''
      or
     '''
     listBox.DataSource = ???


}

listScoreBox.DataSource = score.Select(s => new { s.Key, s.FirstOrDefault().CompanyName, s.FirstOrDefault().City }).ToList();