Where is my System.Numerics namespace?

Question

I\'m using Visual Studio 2010 and trying to use the BigInteger type in a C# program. This type is supposed to be available in System.Numerics name

Answer 1

You need to add an assembly reference to System.Numerics.dll

The MSDN entry on BigInteger states:

BigInteger Structure
...
Namespace: System.Numerics
Assembly: System.Numerics (in System.Numerics.dll)

Answer 2

Though most assemblies are the part of the installation, VS does add only some core elements to the reference list of a project (Core, Data, XML etc.). One needs to add other references by hand using Reference Manager.

Right-click your project, then select Add Reference (or Add->Reference). System.Numerics resides in Assemblies. Then you can use using System.Numerics; in project files.

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PS: this answer is not intended to get any vote. It is only for future reference if someone needs how to do it, just as I needed before this answer.