Question

How to use #warning to check a preprocessor expression and display warning message in C#

Answer 1

#define DEBUG

using System;

class Program
{
  static void Main(string[] args)
  {
    #if (DEBUG)
        #warning DEBUG IS ON
    #endif
  }
}



/*
run:

test.cs(11,0): warning CS1030: #warning: `DEBUG IS ON'

*/

 

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