public int CompareTo(ClassOffert other)
{
int price1 = 0, price2 = 0;
try
{
price1 = int.Parse(other.Cena.Replace("zł", "").Replace(" ", ""));
price2 = int.Parse(Cena.Replace("zł", "").Replace(" ", ""));
}catch
{
price1 = getNumber(other.Cena);
price2 = getNumber(other.Cena);
}
return(price2.CompareTo(price1));
}