C# preprocessor differentiate between operating systems

Question

Is it possible to differentiate between operating systems in C# using preprocessor? like :

#if OS_WINDOWS
//windows methods
#elif O         


        

Answer 1

No. Sadly you can't. And it is even logical: if you compile for AnyCPU, then your program is executable on any platform.

What you can do is create multiple project configurations, where you set the #define you want (in the Properties of the project, Build, Conditional compilation symbols).

But perhaps this is a XY problem... Normally you don't need to do it, and you can live with a

if (Environment.OSVersion.Platform == PlatformID.Win32NT)
{

}
else if (Environment.OSVersion.Platform == PlatformID.MacOSX)
{

}
else if (Environment.OSVersion.Platform == PlatformID.Unix)
{

}