Xamarin - 多目标 - “'System.ValueTuple`2' 在多重引用中声明”

Question

As soon as I try to compile code that use C# 7 tuples with multi targets ( netstandard2.0 and xamarin.iOS ) I got the following error:

Predefined type 'System.ValueTuple`2' is declared in multiple referenced assemblies

Answer 1

It might've been added automatically as a reference from another package. Just remove that NuGet package to resolve the conflict.

uninstall-package System.ValueTuple is the command for the package manager console.

Answer 2

我不知道冲突发生在哪个程序集中。但是，我意识到我自己没有添加ValueTuple nuget 包，所以我明确添加了并且错误消失了。