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#warning lets you generate a level one warning from a specific location in your code.

#warning text


The text of the warning that should appear in the compiler's output.


A common use of #warning is in a conditional directive. It is also possible to generate a user-defined error with #error.


// preprocessor_warning.cs
// CS1030 expected
#define DEBUG
public class MyClass 
   public static void Main() 
      #if DEBUG
      #warning DEBUG is defined

See Also

C# Preprocessor Directives

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