#507 – You can #define Other Symbols within a #if Block
January 27, 2012 Leave a comment
Within the body of an #if/#endif pair, you can include #define or #undef directives. If the body of the #if does contain #define or #undef directives, it must appear before the first token of the containing source file.
#define DOGSBARK #if DOGSBARK || DOGSGROWL #define DOGSMAKENOISE #endif using System; using DogLibrary; namespace ConsoleApplication1 { class Program { static void Main() { Dog d = new Dog("Kirby", 12); #if DOGSMAKENOISE d.BarkOrGrowl(); #endif } } }