Bug - there is a piece of C# code in F# template

[kumkee]

In the F# project template, there is a C# lambda function in this F# code, making it fail to compile.

let host =
        HostBuilder()
            .ConfigureFunctionsWorkerDefaults()
            .ConfigureServices(services => {
                services.AddApplicationInsightsTelemetryWorkerService();
                services.ConfigureFunctionsApplicationInsights();
            })
            .Build()

In addition, this dot-method calling is not an F# style at all.

Could someone familiar with both languages please fix these?