C＃WP8 AddRefference TargetPlatform Switch失败

Question

我有一个WP 8.1项目 - WP_Proj_8.1 然后尝试将WP 8.0项目添加为Lib - WP_Proj_8.0（OpticalReaderLib）

I right Click on the 8.1 Porject,
AddRefference,
select the WP_Proj_8.0,
Hit OK

然后失败了，像这样的东西弹出：

Unable to add a reference to project <WP_Proj_8.0>

然后我将8.0项目升级到8.1。 但它升级到了8.1 Silverlight。我不知道重要与否。 但是当添加引用时，仍然失败。

然后我尝试检查两个项目的目标框架，

但是这两个项目都没有选择框！

那么我可以做些什么来添加到WP8.1项目？ 谢谢！

Answer 1

我猜你的8.1项目是8.1 XAML（WinRT）。你不能将WinRT与Silverlight混合使用。您必须将8.0库重写为WinRT或找到WinRT库。

Answer 2

OK, I completely know what's going on there.
For those who want to upgrade WP8.0 to WP8.1,
It's impossible.

XAML(WinRT) and Silverlight are 2 completely different stuff.
And there's no way to add a Silverlight ref from a XAML(WinRT)

[WP8.0] is a short name for [WP8.0 SilverLight]
So after upgrade from 8.0 to 8.1, 
It became [WP8.1 SilverLight], that's what is should be.

So for those who wanna upgrade a [WP8.0] to [WP8.1],
It's impossible,
because you're trying to upgrade [WP8.0 Silverlight] to [WP8.1 RT]
You need to re-create a project and manually upgrade them.
That's pretty much of it.
Thanks for the answer, lgor Kulman.

WP sucks! Damn!