Use Java biginteger in C #

There is no biginteger in C #, and sometimes it is inconvenient. In fact, in C #, some classes in Java can be used, the method used for callback is as follows: first add the reference vjslib (which is actually J #), and then we can use the biginteger class, below is a short section of my workshopProgramIn fact, the two big numbers are multiplied.

Using system;
Using system. Collections. Generic;
Using system. text;
Using java. Math;

Namespace bigintegertester
{
Class Program
{
Static void main (string [] ARGs)
{
Biginteger A = new biginteger (console. Readline ());
Biginteger B = new biginteger (console. Readline ());
Console. writeline (A. Multiply (B ));
}
}
}

Just put it simple. Other types can also be used in a similar way.