哪个更有效率？
//Option 1
foreach (var q in baseQuery)
{
m_TotalCashDeposit += q.deposit.Cash
m_TotalCheckDeposit += q.deposit.Check
m_TotalCashWithdrawal += q.withdraw.Cash
m_TotalCheckWithdrawal += q.withdraw.Check
}
//Option 2
m_TotalCashDeposit = baseQuery.Sum(q => q.deposit.Cash);
m_TotalCheckDeposit = baseQuery.Sum(q => q.deposit.Check);
m_TotalCashWithdrawal = baseQuery.Sum(q => q.withdraw.Cash);
m_TotalCheckWithdrawal = baseQuery.Sum(q => q.withdraw.Check);
我想我要问的是,调用Sum将基本列举在列表上吗？所以,如果我四次打电话给Sum,是不是列举了四次列表呢？只做一个foreach不是更有效率所以我只需要列举一次列表吗？
