De DataRow[] a DataTable

 private DataTable GetDatatable(DataRow[] rows)
        {
            DataTable table1 = new DataTable();
            table1.Columns.Add("Columna1");
            foreach (DataRow row in rows)
            {
                DataRow newRow = table1.NewRow();
                table1.Rows.Add(newRow);
                newRow.ItemArray = row.ItemArray;
            }
            return table1;
        }