Looking for a preprocessor directive in c# for importing dll based on whether the executable is 64bit or 32 bit:

#if WIN64
[DllImport("ZLIB64.dll", CallingConvention=CallingConvention.Cdecl)]
#else
[DllImport("ZLIB32.dll", CallingConvention=CallingConvention.Cdecl)]
c#
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