[BUG] OneDriveGraphApi.ShareItem with Organization scope does not work as expected

[DemiDOS]

Description
I get the message Access Denied for my corporate account in browser when I use the link generated by the API method OneDriveGraphApi.ShareItem with Organization scope.

To Reproduce
Steps to reproduce the behavior:

1. Upload a file and generate link to file using API:
   var oneDriveGraphApi = new OneDriveGraphApi(_oneDriveApiInfo.ClientId);
await oneDriveGraphApi.AuthenticateUsingRefreshToken(_oneDriveApiInfo.RefreshToken);
var oneDriveFile = await oneDriveGraphApi.UploadFileToAppFolder(filePath);
var oneDrivePermission = await oneDriveGraphApi.ShareItem(oneDriveFile, OneDriveLinkType.View, OneDriveSharingScope.Organization);
2. Check the file on OneDrive. The file was uploaded and shared via link, but the link does not work.
3. If anonymous access is disabled in organization, there is an issue with access to file via link.

Expected behavior
Uploaded file should be accessible via link for everyone inside organization.

Versions:

• OS: Windows 10
• OneDriveApi: 2.4.0
• .NET 6.0

[DemiDOS]

Quick look into problem:
request (https://graph.microsoft.com/v1.0/me/drive/items/***/createLink) contains empty body. I guess, serialization of OneDriveRequestShare instance always create empty string and does not respect provided values.

[frankashley]

I think the issue is the move to System.Text.Json. The serialization is using the base type. I ended up with this helper function that needed to be used in two places. Two places I was having problems with these enums: NameConflictBehavior and OneDriveLinkType. I don't know why EnumMember Attribute wasn't good enough.

    private string SerializeEnumStringAsValueToJson<T>(T obj) where T : OneDriveItemBase
    {
        var options = new JsonSerializerOptions
        {
            Converters = { new JsonStringEnumConverter(JsonNamingPolicy.CamelCase) }
        };
        return JsonSerializer.Serialize(obj, obj.GetType(), options);
    }