Where do I find the machine epsilon in C#?

Question

The machine epsilon is canonically defined as the smallest number which added to one, gives a result different from one.

There is a Double.Epsilon but t

Answer 1

Just hard-code the value:

const double e1 = 2.2204460492503131e-16;

or use the power of two:

static readonly double e2 = Math.Pow(2, -52);

or use your definition (more or less):

static readonly double e3 = BitConverter.Int64BitsToDouble(BitConverter.DoubleToInt64Bits(1.0) + 1L) - 1.0;

And see Wikipedia: machine epsilon.