CODEWITHSUNDEEP
c#c#-7.0
Zev Spitz
Zev Spitz

Reputation: 15297

C# Interactive not recognizing ValueTuple reference

I cannot use tuples in the C# Interactive window; I get the following error:

(1,15): error CS8137: Cannot define a class or member that utilizes tuples because the compiler required type 'System.Runtime.CompilerServices.TupleElementNamesAttribute' cannot be found. Are you missing a reference?
(1,15): error CS8179: Predefined type 'System.ValueTuple`2' is not defined or imported
(2,9): error CS0103: The name 'IsLiteralTypeName' does not exist in the current context
(2,47): error CS8179: Predefined type 'System.ValueTuple`2' is not defined or imported
(5,12): error CS8179: Predefined type 'System.ValueTuple`2' is not defined or imported

This even after I've added a reference to the ValueType assembly:

#r "D:\MyProject\packages\System.ValueTuple.4.3.1\lib\netstandard1.0\System.ValueTuple.dll"

How can I make use of value tuples from the C# Interactive window?

Upvotes: 1

Views: 1285

Answers (1)

Once Upon a Dev
Once Upon a Dev

Reputation: 1108

Remove /r:System.ValueTuple.dll from

C:\Program Files (x86)\Microsoft Visual Studio\2017\<edition>\Common7\IDE\CommonExtensions\Microsoft\ManagedLanguages\VBCSharp\InteractiveComponents\CSharpInteractive.rsp

for Visual Studio 2017 and 

C:\Program Files (x86)\Microsoft Visual Studio\2017\<edition>\MSBuild\15.0\Bin\Roslyn\csi.rsp

for the command line tool (csi.exe)

Upvotes: 2

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