Question

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

Answer 1

#define DEBUG

using System;

class Program
{
  static void Main(string[] args)
  {
    #if (DEBUG)
         #error Turn off Debug
    #endif
  }
}



/*
run:

test.cs(11,0): error CS1029: #error: 'Turn off Debug'

*/

 

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