Is .NET “double” arithmetic independent of platform/architecture?

Question

If I run a complex calculation involving System.Double on .NET under Windows (x86 and x64) and then on Mono (Linux, Unix, whatever), am I absolutely guaranteed to get exactly the same result in all cases, or does the specification allow for some leeway in the calculation?

Answer 1

From MSDN

In addition, the loss of precision that results from arithmetic, assignment, and parsing operations with Double values may differ by platform. For example, the result of assigning a literal Double value may differ in the 32-bit and 64-bit versions of the .NET Framework

Hope that helps.