Warning CS8632 The annotation for nullable reference types should only be used in code within a '#nullable' annotations context

[JamalAPI]

Getting a warning on compile on Joke[]? jokes :

Warning CS8632 The annotation for nullable reference types should only be used in code within a '#nullable' annotations context. WorkerService1 JokeService.cs 27

// The API returns an array with a single entry. Joke[]? jokes = await _httpClient.GetFromJsonAsync<Joke[]>( JokeApiUrl, _options);

also on Joke? joke = jokes?[0];

Removing the ? corrected the issue per the VS fix it recommendation.

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Document Details

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• ID: ed148088-4550-2788-0756-390eab15e3f6
• Version Independent ID: 64d5cdf8-e50f-0c89-7f16-82645ba6383e
• Content: Create a Windows Service using BackgroundService
• Content Source: docs/core/extensions/windows-service.md
• Product: dotnet-fundamentals
• GitHub Login: @IEvangelist
• Microsoft Alias: dapine

[IEvangelist]

The linked source code that's part of this example does in fact have a nullable context:

https://github.com/dotnet/samples/blob/02542327173a035562ec7cc3580244d576ed38d9/core/workers/windows-service/App.WindowsService.csproj#L6

But I see that the steps do not include it, we should add that to make it more clear. I'll do that, thank you.