public void deleteAllFromOrder(Sushi sushi)
{
int c = sushis.Count(s => s.Name == sushi.Name);
TotalPrice -= c * sushi.Price;
sushis.RemoveAll(v => v.Name == sushi.Name);
}
public void deleteFromOrder(Sushi sushi)
{
int index = sushis.FindIndex(v => v.Name == sushi.Name);
if (index != -1)
{
sushis.RemoveAt(index);
TotalPrice -= sushi.Price;
}
}
public void addToOrder(Sushi sushi)
{
sushis.Add(sushi);
TotalPrice += sushi.Price;
}