Linq GroupBy and Sum over two fields

var query = feeAllRecords
    .GroupBy(f => new { f.AccountNo, f.FeeTypeID })
    .Select(group => new { fee = group.Key, total = group.Sum(f => f.FeeAmount) });

List<inFee> feeRecords = new List<inFee>(feeAllRecords.Capacity);
foreach (var rec in query)
{
    inFee fee2 = new inFee();
    fee2.AccountNo = rec.fee.AccountNo;
    fee2.FeeTypeID = rec.fee.FeeTypeID;
    fee2.FeeAmount = rec.total;

    feeRecords.Add(fee2);
}