fork download
copy 
  1. using System;
  2.  
  3. public interface IExtension
  4. {
  5.    public static int Multiple(this int a)
  6.    {
  7.        return a * 2;
  8.    }
  9. }
  10.  
  11. public class Test
  12. {
  13. 	public static void Main()
  14. 	{
  15. 		// your code goes here
  16. 	}
  17. }
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin
copy 
Standard input is empty
compilation info 
prog.cs(5,22): error CS0106: The modifier `public' is not valid for this item
prog.cs(5,22): error CS0106: The modifier `static' is not valid for this item
prog.cs(5,22): error CS0531: `IExtension.Multiple(this int)': interface members cannot have a definition
Compilation failed: 3 error(s), 0 warnings
stdout
copy 
Standard output is empty
https://ideone.com/13sL89
language:
C# (gmcs 5.20.1)
created:
10 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!