Can't using Windows.Devices.Bluetooth namespace in worker service based application

Question

I created a new worker service base application project named WorkerService1. And then I updated Program.cs as follows. But Visual Studio Community 222 build failed with "CS0246 can't find namespace Windows".

using WorkerService1;

using Windows.Devices.Bluetooth;

var builder = Host.CreateApplicationBuilder(args);

builder.Services.AddHostedService<Worker>();

var host = builder.Build();

host.Run();

Answer 1

Target OS and Target OS version must be set for Windows.