Alex Rivera | Logout

Why does C# use implicit void Main?

Asked 2010-03-02T15:11:42.610
13

I don't understand why C#'s Main function is void by default (in a console project for example). In C and C++ the standard clearly says main must return int, and using a return value makes sense because we can check that return value from an external program and see if the C/C++ application finished successfully or encountered an error.

So my questions are:

  1. Why does Visual Studio declare Main as void?
  2. What's the best way of returning a value to the OS once a C# console application has finished executing?
c# .net standards
Edit
Report

2 Answers

12

In C#, you can use, see MSDN :

 static int Main() 
 static int Main(string[] args)
 static void Main() 
 static void Main(string[] args)

You can also return a (int) value in 2 ways.

In a Console application I would use int Main() { ...; return 2; }

In a WinForms/WPF/... app, in the rare situation it needs a return value, I would use
Environment.ExitCode = 1; or Environment.Exit(1);

answered 2010-03-02T15:16:06.520
3

You can change the return type of Main without causing any problems.

answered 2010-03-02T15:15:38.903

Your Answer