Invalid comparison of long numbers

[ltetak]

There is a problem when comparing small and big numbers. GetNumber returns ulong for small numbers and BigInteger for really big numbers. But these two types do not play along nicely so if you compare one with the the other it will crash here

NaturalStringComparer/src/NaturalStringComparer/NaturalComparer.cs

Line 87 in a6b7e21

var compareResult = xNum.CompareTo(yNum);

One solution could be to unify these two types (convert to BigInteger) before comparing.

[GihanSoft]

Very good point. I'll fix this as soon as I'm free. Tanks