Hello world in IronPython with WinForms

gistfile1.py

#!/usr/bin/env ipy
import clr
clr.AddReference('System.Windows.Forms')

from System.Windows.Forms import Form, Button, Application

class HelloForm(Form):
    def __init__(self):
        super(HelloForm, self).__init__()
        self.button = Button()
        self.button.Click += self.on_button_clicked
        self.button.Text = 'Click'
        self.Controls.Add(self.button)

    def on_button_clicked(self, sender, event):
        sender.Text = 'Success!'

if __name__ == '__main__':
    Application.Run(HelloForm())