using var host = Host.CreateDefaultBuilder()
    .ConfigureLogging((context, builder) =>
    {
        builder.AddSentry(options =>
        {
            options.BeforeSend = sentryEvent =>
            {
                sentryEvent.AddBreadcrumb("Hello"); // I can do this
                sentryEvent.AddAttachment("Foo.txt"); // But I cannot do this
                return sentryEvent;
            };
        };
    })
    .Build();