They've also created a first class library there that gets a lot of use. (bookreporter.com)
Portable class library for computations with big numbers such as Int128, Int256 and BigInteger. (nuget.org)
When Oracle sued Google back in 2010, there were three aspects to the case: Oracle had accused Google of copying Java application programming interface (API) designs into the APIs of its Android mobile operating system; basing Android class libraries on Java API designs; and copying from Java code into Android code. (itwire.com)