How to add a reference to System.Numerics.dll

Question

I want to use the BigInteger class from the System.Numerics but if i want to write

using System.Numerics;

Numerics is not fou

Answer 1

Right click the Reference folder in your solution and choose Add Reference. Then go to :\Windows\Microsoft.NET\assembly\GAC_MSIL\System.Numerics\v4.0_4.0.0.0__b77a5c561934e089 (That's what it is for me; your path might be different.)