Using the #else Directive

You can conditionally compile code using the #if and #endif preprocessor directive.  You can also use an #else clause between the #if and the #endif.
In the code below, we’ve commented out the definition of DOGSBARK, so the code between the #else and #endif will be compiled.
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//#define DOGSBARK
 
using System;
using DogLibrary;
 
namespace ConsoleApplication1
{
    class Program
    {
        static void Main()
        {
            Dog d1 = new Dog("Kirby", 12);
#if DOGSBARK
            d1.Bark();
#else
            d1.WagTail();
#endif
        }
    }
}
Note that the code after the #if directive is greyed out, while the code after the #else is formatted normally.


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