Receiving Null Exception from Simple Kestrel Server in Worker Service - asp.net-core

Question

I am trying to build a simple test. I have gotten the Kestrel code to work within a console app but I am not able to within a Worker Service. When I make a call against the port, I get the null exception. In debugging I can't tell which part is null, everything looks like it has values. I feel like its a scope issue. I have tried saving the webbuilderhost several different ways. Still get the same error. I have tried starting the host in several different places including it's own class. Any Advice would be appreciated.
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
namespace ServiceWorker
{
public class WindowsBackgroundService : BackgroundService
{
private readonly ILogger<WindowsBackgroundService> _logger;
public WindowsBackgroundService(ILogger<WindowsBackgroundService> logger)
{
_logger = logger;
}
public override async Task StartAsync(CancellationToken cancellationToken)
{
var host = new WebHostBuilder()
.UseUrls("http://*:5555")
.UseKestrel()
.Configure(app =>
{
app.Run(async context => await context.Response.WriteAsync("Current Date: " + DateTime.Now));
}
).Build();
host.RunAsync();
}
protected override async Task ExecuteAsync(CancellationToken stoppingToken)
{
while (!stoppingToken.IsCancellationRequested)
{
//_logger.LogInformation("Worker running at: {time}", DateTimeOffset.Now);
await Task.Delay(1000, stoppingToken);
}
}
}
}
using ServiceWorker;
IHost host = Host.CreateDefaultBuilder(args)
.UseWindowsService(options =>
{
options.ServiceName = "Porthog Service";
})
.ConfigureServices(services =>
{
services.AddHostedService<WindowsBackgroundService>();
})
.ConfigureLogging(logging =>
{
logging.ClearProviders();
logging.SetMinimumLevel(Microsoft.Extensions.Logging.LogLevel.Trace);
})
.Build();
await host.RunAsync();