Question

I need to compile code conditionally by the CLR version.
e.g there’s a code that I need to compile only in CLR 2 (.NET 3.5 VS2008) and not in CLR 4 (.NET 4 VS2010)
Is there a precompiler directive for the current CLR version that I can use inside an #if clause?

Thanks.

Answer 1

Not as I know.

try use your own one, such like:

#if CLR_V2
  #if CLR_V4
    #error You can't define CLR_V2 and CLR_V4 at the same time
  #endif

  code for clr 2

#elif CLR_V4

  code for clr 4

#else
  #error Define either CLR_V2 or CLR_V4 to compile
#endif

And then you can define CLR_V2 and/or CLR_V4 in project properties window of Visual Studio, or csc command line arguments.