How to create a modeless dialog box within a C# console app

Question

I want to create a modeless dialog box with below code. However, the form seems not responding after creation. I guess the message loop may be blocked if I create it in this way. Anyone knows how to create it in the correct way?

class Program
{
    static void Main(string[] args)
    {
        Form form = new Form();
        form.Show();
        Console.ReadLine();
    }
}

Answer 1

Displaying Modal and Modeless Windows Forms:

To display a form as a modeless dialog box Call the Show method:
The following example shows how to display an About dialog box in modeless format.

// C#
//Display frmAbout as a modeless dialog
Form f= new Form();
f.Show();

To display a form as a modal dialog box Call the ShowDialog method.
The following example shows how to display a dialog box modally.

// C#
//Display frmAbout as a modal dialog
Form frmAbout = new Form();
frmAbout.ShowDialog();

See: Displaying Modal and Modeless Windows Forms

---

See the following console application code:

using System;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;

class Test
{
    [STAThread]
    static void Main()
    {
        var f = new Form();
        f.Text = "modeless ";
        f.Show();

        var f2 = new Form() { Text = "modal " };

        Application.Run(f2);
        Console.WriteLine("Bye");

    }
}

you may use another thread, but you must wait for that thread to join or abort it:
like this working sample code:

using System;
using System.Threading;
using System.Windows.Forms;

namespace ConsoleApplication2
{
    static class Test
    {
        [STAThread]
        static void Main()
        {
            var f = new Form { Text = "Modeless Windows Forms" };
            var t = new Thread(() => Application.Run(f));
            t.Start();

            // do some job here then press enter
            Console.WriteLine("Press Enter to Exit");
            var line = Console.ReadLine();
            Console.WriteLine(line);

            //say Hi
            if (t.IsAlive) f.Invoke((Action)(() => f.Text = "Hi"));

            if (!t.IsAlive) return;
            Console.WriteLine("Close The Window");
            // t.Abort();
            t.Join();
        }
    }
}

Answer 2

Finally, I got it working. In order to unblock my main thread, I have to use a new thread and call Applicatoin.Run to create a message pump for the form. Now both the form and main thread are alive now. Thanks all

class Program
{

    public static void ThreadProc(object arg)
    {
        Form form = arg as Form;
        Application.Run(form);
    }

    [STAThread]
    static void Main(string[] args)
    {
        Form form = new Form() { Text = "test" };

        Thread t = new Thread(ThreadProc);
        t.Start(form);
        string line = Console.ReadLine();
        Console.WriteLine(line);

        form.Close();
    }
}