Gets the value of DBL_EPSILON, which is the smallest positive floating point number x such that 1 + x != 1.
This is different than Double.Epsilon which is the smallest positive Double value that is greater than zero.
RhinoCommon (in RhinoCommon.dll)
public const double Epsilon = 2.22044604925031E-16
Public Const Epsilon As Double = 2.22044604925031E-16
This is equivalent to openNURBS ON_EPSILON.