How to get a -0 result in floating point calculations and distinguish it from +0 in C#?

Question

The MSDN documentation mentions that double type includes negative zero. However, both -1.0 / double.PositiveInfinity and -double.Epsilon / 2

Answer 1

After checking, I see that -1.0 / double.PositiveInfinity does return -0. Indeed, 1.0 / (-1.0 / double.PositiveInfinity) returns -infinity.