public int CountCheckSum(string pesel)
{
int sum = 0;
if (pesel.Length == PeselStruct.PeselSize)
{
PeselStruct peselObj = new PeselStruct(pesel);
for (int i = 0; i < Weights.Length; i++)
{
sum += Weights[i] * peselObj[i];
}
}
int checkDigit = sum % 10;
return(checkDigit == 0 ? 0 : 10 - checkDigit);
}
public bool IsPeselValid(string pesel)
{
// Check if is number and 11 digit long
if (pesel.Length == PeselStruct.PeselSize)
{
PeselStruct peselObj = new PeselStruct(pesel);
// Check birth date
if (DateValidator.IsDateValid(peselObj.Year, peselObj.Month, peselObj.Day))
{
// Count weighted sum: 1 3 7 9 1 3 7 9 1 3
int lastDigit = CountCheckSum(pesel);
// 11th digit is check sum digit
return(lastDigit == peselObj[10]);
}
}
return(false);
}