in alternativa, è possibile utilizzare UltimateRoundingFunction dato in questo blog: http://rajputyh.blogspot.in/2014/09/the-ultimate-rounding-function.html
//amountToRound => input amount
//nearestOf => .25 if round to quater, 0.01 for rounding to 1 cent, 1 for rounding to $1
//fairness => btween 0 to 0.9999999___.
// 0 means floor and 0.99999... means ceiling. But for ceiling, I would recommend, Math.Ceiling
// 0.5 = Standard Rounding function. It will round up the border case. i.e. 1.5 to 2 and not 1.
// 0.4999999... non-standard rounding function. Where border case is rounded down. i.e. 1.5 to 1 and not 2.
// 0.75 means first 75% values will be rounded down, rest 25% value will be rounded up.
decimal UltimateRoundingFunction(decimal amountToRound, decimal nearstOf, decimal fairness)
{
return Math.Floor(amountToRound/nearstOf + fairness) * nearstOf;
}
Chiama sotto per arrotondamento standard. cioè 1.125 viene arrotondato a 1,25
UltimateRoundingFunction(amountToRound, 0.25m, 0.5m);
chiamata sotto per arrotondando valori di confine. vale a dire 1.125 sarà arrotondato a 1,00
UltimateRoundingFunction(amountToRound, 0.25m, 0.4999999999999999m);
cosiddetto "banchiere arrotondamento" non è possibile con UltimateRoundingFunction, si è di andare con la risposta di paxdiablo per tale sostegno :)