问题
Everyone is writing about how great the new type Span<T> is so I eagerly wanted to start rewriting a couple of methods in my libraries but where do I actually find it? I've updated Visual Studio 2017 to the latest version 15.5.0 where the change-log says:
The C# compiler now supports the 7.2 set of language features including:
- Support for the
Span<T>type being used throughout Kestrel and CoreFX via the ref struct modifier.
but when I try to use it my code I'm getting an error and intellisense cannot resolve it. It's a .net 4.6.2 project and the language version is set to latest minor.
Do I need to install some NuGet package in order to be able to use it? I can't figure this out.
回答1:
You need to install prerelease version (check "Include prerelease" checkbox in nuget manager) of System.Memory package. Then just use Span (it's in System namespace).
来源：https://stackoverflow.com/questions/47849352/how-do-i-reference-system-spant-in-my-dotnet-core-project