Implement Span<T> in Unity

Question

I'm trying to use Span in Unity.

I understand that System.Memory is not supported yet, but I'd like to implement it anyway.

I directly downloaded the library from NuGet. I got the System.Memory.dll from netstandard2.0 folder in the nuget package and dragged it in the project Assets/Scripts folder.

But I get this error, and I cannot use it in my IDE (Rider).

Assembly 'Assets/System.Memory.dll' will not be loaded due to errors: Unable to resolve reference 'System.Runtime.CompilerServices.Unsafe'. Is the assembly missing or incompatible with the current platform?

My question is: how can I use Span in Unity?

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Unity Version: Unity 2019.1.7f.
OS: Windows

Answer 1

Nuget may generate issues in Unity.

The solution is to directly download the dll.

1. Get the library from the direct download => Download Package

2. Import the System.Memory.dll from lib/netstandartd2.0 folder into the Project Window

3. Select System.Memory.dll in the Project Window then Disable "Validate Reference"

I took the info from unity forum and applied to my situation. (In the forum they are using Unity Packages, while I'm just setting the library on the Assets)