/// <summary>
/// Validate the subject for the given expected checksum.
/// The checksum is calculated and then compared to the expected one.
/// </summary>
/// <param name="calculator">The algorithm</param>
/// <param name="subject">the text to check</param>
/// <param name="expectedChecksum">the checksum that is expected</param>
/// <returns>Is the expected checksum found</returns>
public static bool Validate(this IChecksumCalculator calculator, string subject, string expectedChecksum)
{
return(calculator.Validate(subject, int.Parse(expectedChecksum, CultureInfo.InvariantCulture)));
}
/// <summary>
/// Validate the given string having the last digit to be the check digit
/// </summary>
/// <param name="calculator">the algorithm</param>
/// <param name="includingChecksumAsFinalDigit">the full number to validate including the last digit that is the expected checksum</param>
/// <returns>Is the given number valid</returns>
public static bool Validate(this IChecksumCalculator calculator, string includingChecksumAsFinalDigit)
{
int indexOfCheckDigit = includingChecksumAsFinalDigit.Length - 1;
return(calculator.Validate(includingChecksumAsFinalDigit.Substring(0, indexOfCheckDigit), includingChecksumAsFinalDigit.Substring(indexOfCheckDigit)));
}