public double GiveChange(double price)
{
if (price == UserCoinsTotal())
{
return(0);
}
double Remainder = RemainderFromUserCoins(price);
int NumberOfCoinsToRemove = 0;
foreach (Coin coin in CoinStock)
{
if (-Remainder >= coin.Value)
{
Remainder += coin.Value;
CoinsToReturn.Add(coin);
NumberOfCoinsToRemove++;
}
}
CoinStock.RemoveRange(0, NumberOfCoinsToRemove);
return(ChangeTotal());
}
private double ChangeTotal()
{
return(CoinsToReturn.Sum(coin => coin.Value));
}