Program.cs

using OpenTrading.Apps.Simulations;
using OpenTrading.Services;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Configuration;

CultureInfo.DefaultThreadCurrentCulture = CultureInfo.DefaultThreadCurrentUICulture = new CultureInfo("en-US");

var server = new Server();

// Configure user secrets (UserSecretsId is set in .csproj)
var configurationBuilder = new ConfigurationBuilder()
    .AddUserSecrets("OpenTrading");
var configuration = configurationBuilder.Build();

// Register configuration
server.Services.AddSingleton<IConfiguration>(configuration);

// Register services
server.Services.AddSingleton<IHttpClientFactory, DefaultHttpClientFactory>();
server.Services.AddHttpClient();
server.Services.AddSingleton<IStockDataService, StockDataService>();
server.Services.AddSingleton<ITradingService, TradingService>();
server.Services.AddSingleton<IPositionService, PositionService>();
server.Services.AddSingleton<IAgentService, BaseAgentService>();
server.Services.AddSingleton<IConfigService, ConfigService>();
server.Services.AddSingleton<ILogService, LogService>();
server.Services.AddSingleton<ISimulationService, SimulationService>();

#if DEBUG
server.UseHotReload();
#endif

server.AddAppsFromAssembly();
server.AddConnectionsFromAssembly();

var chromeSettings = new ChromeSettings().DefaultApp<TradingArenaApp>().UseTabs(preventDuplicates: true);
server.UseChrome(chromeSettings);
await server.RunAsync();

// Simple implementation for IHttpClientFactory
internal class DefaultHttpClientFactory : IHttpClientFactory
{
    public HttpClient CreateClient(string name) => new HttpClient();
}