我终于解决了！我花了将近两天的时间才找到解决方案，并且没有在任何地方记录，所以我想与您分享我的结果:

I finally solved it! It took me nearly two days to find the solution and it is not documented anywhere sothat I would like to share my results with you:

// Open official Facebook app for sharing
await Windows.System.Launcher.LaunchUriAsync(new Uri("fb:post?text=foo"));

我认为这是一个非常酷的功能，提醒用户它在其他平台上的工作方式.

I think this is a very cool feature and reminds users of how it works on other plarforms.

总而言之，通过 URI 方案从您的应用启动其他应用始终是具有良好用户体验的绝佳方案.

In conclusion launching other apps from your app via URI schemes is always a great scenario with a nice user experience.

提示:通过 URI 方案打开官方 Facebook 应用程序至少需要 4.1 版本！