在IronPython中如何在不关闭.NET应用的情况下关闭WPF窗口

import clr
from System.Windows import Application, Window

class MyWindow(Window):
    def __init__(self):
        self.Title = "My Window"
        self.Width = 400
        self.Height = 300

app = Application()
window = MyWindow()
app.Run(window)

window.Close()

import clr
from System.Windows import Application, Window

class MyWindow(Window):
    def __init__(self):
        self.Title = "My Window"
        self.Width = 400
        self.Height = 300

app = Application()
window = MyWindow()
app.Run(window)

# 在需要关闭窗口的地方
window.Close()