BindingSource bs = new BindingSource();
DataTable table = new DataTable();

void Load(FileInfo f)
            table.Clear();
            string sConnectionString = String.Format(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source={0};Extended Properties='text;FMT=Delimited(,);HDR=No'",f.DirectoryName);
            using (OleDbConnection conn = new OleDbConnection(sConnectionString))
            using (OleDbCommand com = new OleDbCommand("SELECT * FROM [" + f.Name + "]", conn))
            {
                conn.Open();                
                OleDbDataReader reader = com.ExecuteReader();
                table.Load(reader);
            }

            bs.DataSource = table;                
            bs.Sort = "F1 DESC";
            dataGridView1.DataSource = bs;           
}