How to Convert long strings to big numbers

Question

Lets say we want to Convert/Parse following string

string mystring = "221021290110000123452229211210282900128222900"

to an number

Of what type would this number be?

i tested Double.TryParse(mystring,out myBigNumber) but i got an E+ number which i can't use for my mathematical operations because the modulo operation will result in a wrong number

Answer 1

var bigNumber = BigInteger.Parse(mystring);

See BigInteger.Parse.

As far as I know BigInteger is limited by the amount of memory you have available.

Answer 2

BigInteger is what you are looking for