First Row : Syntax

Epicor ERP 10
1

Does anyone knows how can I take the first row out this

foreach (var DBOrderHed_iterator in (from DBOrderHed_Row in Db.OrderRel
where
(int) DBOrderHed_Row.OrderNum == (int) inOrderNumber
select DBOrderHed_Row)
)

2 

  var orderRelRow = Db.OrderRel.With(LockHint.NoLock).Where(row =>  row.OrderNum == inOrderNumber).FirstOrDefault();
if(orderRelRow != null)
{
}