[RESOLVED] I need to pop up a messagebox in Console

[angelica]

Hi ,
========================================
Error 1 The type or namespace name 'Windows' does not exist in the namespace 'System' (are you missing an assembly reference?)
========================================

what is wrong with this code please ?

using System;
using System.Windows.Forms;

namespace MsgBox
{
    class Program
    {
        static void Main(string[] args)
        {
          MessageBox.Show("Hello World");
                        
        }
    }
}