Errors in newly created GTK# project

Question

I just installed Monodevelop 5.7.0 in Ubuntu 14.10 in a 32bit machine. I created some console C# applications for testing and everything works fine. But when I tried to create a GTK# project and execute it, I have the following 3 errors in the Program and MainWindow classes:

the type or namespace name 'Init' does not exist in the namespace 'Application'
the type or namespace name 'Run' does not exist in the namespace 'Application'
the type or namespace name 'Quit' does not exist in the namespace 'Application'

I've been trying to add some references and searching for other solutions but with no luck.

These are the classes of the application:

Program.cs

using System;
using Gtk;

namespace Application
{
    class MainClass
    {
        public static void Main (string[] args)
        {
            Application.Init ();
            MainWindow win = new MainWindow ();
            win.Show ();
            Application.Run ();
        }
    }  
}

MainWindow.cs

using System;
using Gtk;

public partial class MainWindow: Gtk.Window
{
    public MainWindow () : base (Gtk.WindowType.Toplevel)
    {
        Build ();
    }

    protected void OnDeleteEvent (object sender, DeleteEventArgs a)
    {
        Application.Quit ();
        a.RetVal = true;
    }
}

Can you post the relevant excerpts of the code in your question? — Frédéric Hamidi, Apr 21 '15 at 17:56
Is `namespace Application {}` yours or does it come from the boilerplate code MonoDevelop generates when creating your project? A lot of problems come into play when you have a class whose name is the same as a namespace's, the IDE is not supposed to do that. — Frédéric Hamidi, Apr 21 '15 at 21:09
My version of MonoDevelop (3.0.2 on Gentoo) uses the project name as a basis for the namespace around `MainClass` (`namespace monogtktest` in my, well, tests). I can't see `namespace Application` anywhere. Can you specify the version of MonoDevelop you're running? — Frédéric Hamidi, Apr 21 '15 at 21:19
Hah :) Gentoo doesn't even have that as an unstable package, I would have to go through an overlay. That means something. Good luck :) — Frédéric Hamidi, Apr 21 '15 at 21:29

CyborgNinja23 · Accepted Answer · 2018-05-31T19:44:14.600

I just fixed it. When I created the project erroneously I named it "02", so in the class Program.cs, by default Monodevelop named it "Application" instead of the project name, making the errors appear.

You must change the namespace "Application" in the class Program.cs:

Program.cs

using System;
using Gtk;

namespace two // for example
{
    class MainClass
    {
        public static void Main (string[] args)
        {
            Application.Init ();
            MainWindow win = new MainWindow ();
            win.Show ();
            Application.Run ();
        }
    }  
}

To avoid this remember do not use just numbers in the name of your projects.

Errors in newly created GTK# project

1 Answers1