How do I reference System.Span in my dotnet core project?

Asked Dec 16 '17 at 19:43

Active Dec 16 '17 at 19:54

Viewed 332 times

Everybody seems to suggest that it's already available, but I cannot for the life of me figure out how to get System.Span<T>.

The documentation says ".Net Core 2.0", and this post from Mads Torgerson suggests that it shipped with VS 15.5, and we're up to VS 15.5.2, so it must be public for somebody. But I'm working on a mac, and using dotnet core to build my project.

dotnet --version reports 2.1.2. My project is super simple:

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>netstandard2.0</TargetFramework>
    <LangVersion>latest</LangVersion>
  </PropertyGroup>
</Project>

And yet, for all I do, I can't reference System.Span<T>. What am I missing?

edited Dec 16 '17 at 19:54

asked Dec 16 '17 at 19:43

John Doty

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It is a C# **7.2** feature and you have to ensure to use C# **7.2** – Sir Rufo Dec 16 '17 at 19:48
How? I don't have a C# version anywhere in my project. – John Doty Dec 16 '17 at 19:48
Of course you have, but it is set per default to C# **7(.0)** – Sir Rufo Dec 16 '17 at 19:49
Edited: `dotnet build` accepts `latest` and `7.2`, but neither solves my problem. – John Doty Dec 16 '17 at 19:54
@JohnDoty does duplicate question help to solve it? – Evk Dec 16 '17 at 21:05

How do I reference System.Span in my dotnet core project?

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