Xamarin - Multi-targetting - "'System.ValueTuple`2' is declared in multiple referenced"

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

Those targets do not need the ValueTuple NuGet, so maybe remove that? — Cheesebaron, Apr 03 '18 at 16:01
I haven't added ValueTuple as a nuget package nowhere. However, I do use it so its coming from somewhere. — François, Apr 03 '18 at 16:45

score 10 · Answer 1 · answered Apr 09 '18 at 14:08

10

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.

answered Apr 09 '18 at 14:08

Mafii

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That's the opposite: I had to add the nuget package. – François Apr 09 '18 at 14:18

score 5 · Accepted Answer · edited Apr 16 '21 at 08:44

5

I don't know which assemblies the conflict occurred in. However, I realized I had not myself added the ValueTuple nuget package so I explicitly did and the error went away.

edited Apr 16 '21 at 08:44

Mafii

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answered Apr 03 '18 at 16:55

François

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Xamarin - Multi-targetting - "'System.ValueTuple`2' is declared in multiple referenced"

2 Answers2