vs for mac xamarin.forms 將pcl轉換為netstandard後報錯

報錯內容：

Xamarin.Forms targets have been imported multiple times. Please check your project file and remove the duplicate import(s). (XF001)

解決方案：

經過一番谷歌後，找到解決辦法。

原文：

If you converted the PCL project to .NET Standard via the project options the project will be using a project.json. NuGet will generate two files that also import the Xamarin.Forms.props and Xamarin.Forms.targets: projectname.nuget.props and projectname.nuget.targets. If your project file that uses the project.json file also imports the Xamarin.Forms.targets then that may be the double import.

I just reproduced that problem myself with VS Mac 7.3.3. I created a Xamarin.Forms Class Library (Multiplatform - Library) from the project template, then went into project options Build - General and converted the PCL to .NET Standard. Then tried to build the project. I see a build error Xamarin.Forms.2.5.0.121934/build/portable-win+net45+wp80+win81+wpa81/Xamarin.Forms.targets(3,3): Error XF001: Xamarin.Forms targets have been imported multiple times. Please check your project file and remove the duplicate import(s). (XF001)

<Import Project="..\packages\Xamarin.Forms.2.5.0.121934\build\portable-win+net45+wp80+win81+wpa81\Xamarin.Forms.targets" Condition="Exists(‘..\packages\Xamarin.Forms.2.5.0.121934\build\portable-win+net45+wp80+win81+wpa81\Xamarin.Forms.targets‘)" />

翻譯過來就是把 .csproj 中的<Import Project="..\packages\Xamarin.Forms.2.5.0.121934\build\portable-win+net45+wp80+win81+wpa81\Xamarin.Forms.targets" Condition="Exists(‘..\packages\Xamarin.Forms.2.5.0.121934\build\portable-win+net45+wp80+win81+wpa81\Xamarin.Forms.targets‘)" />刪掉後重新打開就行了。

vs for mac xamarin.forms 將pcl轉換為netstandard後報錯