Question

How to use #line to modify the line numbers for preprocessor errors and warnings in C#

Answer 1

#define DEBUG

using System;

class Program
{
  static void Main(string[] args)
  {
    #if (DEBUG)
        #line 200 "modify the line numbers"
        #error Turn off Debug
    #endif
  }
}



/*
run:

modify the line numbers(201,0): error CS1029: #error: 'Turn off Debug'

*/

 

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