/// <summary>
/// To the decimal form.
/// </summary>
/// <param name="source">The source.</param>
/// <param name="notation">Notation object.</param>
/// <returns>decimal form of number</returns>
/// <exception cref="ArgumentNullException">source is null</exception>
public static int ToDecimalForm(this string source, Notation notation)
{
int index = notation.NotationBase;
if (source == null)
{
throw new ArgumentNullException(nameof(source));
}
int result = 0;
char[] array = source.ToCharArray();
for (int i = array.Length - 1; i >= 0; i--)
{
int temp = notation.DigitToDecimal(array[i]);
checked
{
result += temp * (int)Math.Pow(index, array.Length - i - 1);
}
}
return(result);
}