什么“咆哮”类型的通知窗口可用于WPF（在X秒后出现和淡出的窗口）？

I wanted to know if there are any good "growl" type notification windows available as open source or guided tutorials for WPF applications. I'm looking for a window that can appear when users save for example, notifying them that the save was successful and then disappears after X seconds (with a fade out) without the user needing to take the explicit action to close the notification window. This way for messages/notifications that require no confirmation, like the example, the user would not have to click "OK" to make the messagebox or dialog close.I wanted to know if there are any good "growl"