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C# - #pragma Preprocessor Directive Example

Learn about the #pragma preprocessor directive example in C# with the help of example.
Submitted by Nidhi, on October 31, 2020 [Last updated : March 23, 2023]

Here, we will demonstrate the example of #pragma preprocessor directive. We can enable or disable warnings using the #pragma directive. We can disable warning using #pragma disable and warning can be enabled using the #pragma restore directive.

C# program to demonstrate the example of #pragma preprocessor directive

The source code to demonstrate the #pragma preprocessor directive is given below. The given program is compiled and executed successfully on Microsoft Visual Studio.

//C# program to demonstrate the 
//#pragma preprocessor directive.

using System;

class Program
{
   public static void Main()
    {
        #pragma warning restore
        #warning First warning
        #pragma warning disable
        #warning Second warning
    }
}

Output

Warning	1	#warning: 'First warning'

Explanation

The above program will generate a warning because we can enable or disable warnings using the #pragma directive. We can disable warning using "#pragma disable" and warning can be enabled using the "#pragma restore" directive.

Here, we created a Program class that contains the Main() method. The Main() method is the entry point for the program, here we used the #pragma directive to disable and enable warnings.

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