Preprocessing Directives: define : define « Preprocessing Directives « C# / CSharp Tutorial

1. C# / CSharp Tutorial
2. Preprocessing Directives
3. define

1. The #define directive defines a character sequence called a symbol.
2. The existence or nonexistence of a symbol can be determined by #if or #elif

The general form for #define:

#define symbol

#define DEBUGLOG

using System;

class MainClass
{
    public static void Main()
    {
        #if DEBUGLOG
        Console.WriteLine("In Main - Debug Enabled");
        #else
        Console.WriteLine("In Main - No Debug");
        #endif
    }
}

In Main - Debug Enabled