System.Memory.dll present in Unity 2021.2.0f1

[meckzqz]

In Unity 2021.2.0f1, System.Memory.dll is now included, leading to a conflict with the one provided in this package.

[favoyang]

A quick fix is to

• eject the package (move it from the Library/PackageCache/com.solidalloy.type-references@2.11.4 to Packages/com.solidalloy.type-references@2.11.4)
• locate Editor/DLLs/TypeReference_System.Memory.dll and Editor/DLLs/TypeReference_System.Buffers.dll files
• Add NET_STANDARD_2_0 to the Define Constraints list, and click the apply button.

The NET_STANDARD_2_0 label will prevent the DLL to be loaded in a .Net Standard 2.1 profile, which shipped with Unity 2021.2.

Now locate Editor/TypeReferences.Editor.asmdef, you will find the System.Memory.dll references is inactive.

[favoyang]

You can also use !UNITY_2021_2_OR_NEWER instead of NET_STANDARD_2_0 , which could be a bit more accurate.

[favoyang]

I also suggest to depends on UnityNuGet, read more at https://medium.com/openupm/registry-changes-to-conform-to-net-standard-2-1-shipped-with-unity-2021-2-1e9753d49826

package.json

"dependencies": {
    "org.nuget.system.memory": "4.5.4",
    "org.nuget.system.runtime.compilerservices.unsafe": "5.0.0"
},

manifest.json

 "scopedRegistries": [
    {
      "name": "package.openupm.com",
      "url": "https://package.openupm.com",
      "scopes": [
        "com.solidalloy.util",
        "com.solidalloy.type.references",
        "org.nuget.system.memory",
        "org.nuget.system.runtime.compilerservices.unsafe",
        "com.openupm"
      ]
    }
  ],
  "dependencies": {
    "com.solidalloy.type.references": "NEXT_VERSION"
  },

or a more compact version

 "scopedRegistries": [
    {
      "name": "package.openupm.com",
      "url": "https://package.openupm.com",
      "scopes": [
        "com.solidalloy",
        "org.nuget",
        "com.openupm"
      ]
    }
  ],
  "dependencies": {
    "com.solidalloy.type.references": "NEXT_VERSION"
  },

[SolidAlloy]

@favoyang Thanks for the suggestion! I knew about the UnityNuGet uplink feature but didn't use it because I didn't know how well it handled conflicts with DLLs included in Unity's own packages. Now that I encountered a situation where depending on UnityNuGet resolves a problem, I'm glad to start using it.

@meckzqz Please check if the issue is resolved in 2.11.5

[favoyang]

Tested 2.11.5 with Unity 2021.2.0f1, and 2021.1.27f1. It works.