AsyncDisposableTest.cs

public class AsyncDisposableTest : IAsyncDisposable, IDisposable
{
    private readonly ILogger<AsyncDisposableTest> _logger;

    public AsyncDisposableTest(ILogger<AsyncDisposableTest> logger)
    {
        _logger = logger;
        _logger.LogWarning("CREATED");
    }

    public void Dispose()
    {
        _logger.LogWarning("STARTING DISPOSE");
        Thread.Sleep(5000);
        _logger.LogWarning("FINISHED DISPOSE");
    }

    public async ValueTask DisposeAsync()
    {
        _logger.LogWarning("STARTING ASYNC DISPOSE");
        await Task.Delay(5000);
        _logger.LogWarning("FINISHED ASYNC DISPOSE");
    }
}