[API Implementation]: Expose AppContext.SetData in ref assembly

[deeprobin]

Proposal implementation of #47922 (closes #47922)

Proposal

namespace System
{
    public static partial class AppContext
    {
        public static void SetData(string name, object? data);
    }
}

/cc @jkotas
/cc @tannergooding

[ghost]

Note regarding the new-api-needs-documentation label:

This serves as a reminder for when your PR is modifying a ref *.cs file and adding/modifying public APIs, to please make sure the API implementation in the src *.cs file is documented with triple slash comments, so the PR reviewers can sign off that change.

[ghost]

I couldn't figure out the best area label to add to this PR. If you have write-permissions please help me learn by adding exactly one area label.

[jkotas]

Could you please also add a few tests and add doc comment on the implementation?

[ghost]

Tagging subscribers to this area: @dotnet/area-system-runtime
See info in area-owners.md if you want to be subscribed.

Issue Details

---

Proposal implementation of #47922

Proposal

namespace System
{
    public static partial class AppContext
    {
        public static void SetData(string name, object? data);
    }
}

/cc @jkotas
/cc @tannergooding

Author:	deeprobin
Assignees:	-
Labels:	area-System.Runtime, new-api-needs-documentation, community-contribution
Milestone:	-

[danmoseley]

Oh, still needs doc comment on implementation

[deeprobin]

Oh, still needs doc comment on implementation

incoming :)

[deeprobin]

Oh, still needs doc comment on implementation

Done.

@danmoseley I saw also, that GetData has no documentation comment (but in API Docs this is present - https://docs.microsoft.com/en-us/dotnet/api/system.appcontext.getdata?view=net-6.0)
If you want to document GetData afterwards, you can create a new issue regarding this 👍🏼

[jkotas]

GetData has no documentation comment (but in API Docs this is present -

We have a dedicate project to add the documentation comments to all old APIs. No need to file an issue on this.

[deeprobin]

GetData has no documentation comment (but in API Docs this is present -

We have a dedicate project to add the documentation comments to all old APIs. No need to file an issue on this.

Perfect 👍🏼

[jkotas]

Looks good. Thank you!