Int128 in .Net?

Question

I need to do some large integer math. Are there any classes or structs out there that represent a 128-bit integer and implement all of the usual operators?

BTW, I r

Answer 1

No, there's nothing in .NET <= 3.5. I'm hoping/expecting that BigInteger will make its return in .NET 4.0. (It was cut from .NET 3.5.)