VacuumPressureMembranePoreSizeAnalyzer/App.xaml.cs

using System;
using System.IO;
using System.Windows;
using MembranePoreTester.Communication;
using Microsoft.Extensions.Configuration;

namespace MembranePoreTester
{
    public partial class App : Application
    {
        public static IPlcService PlcService { get; private set; }
        public static PlcConfiguration PlcConfig { get; private set; }

        protected override void OnStartup(StartupEventArgs e)
        {
            base.OnStartup(e);

            var builder = new ConfigurationBuilder()
                .SetBasePath(Directory.GetCurrentDirectory())
                .AddJsonFile("appsettings.json", optional: false, reloadOnChange: true);

            var configuration = builder.Build();
            PlcConfig = configuration.GetSection("PlcSettings").Get<PlcConfiguration>();

            if (PlcConfig == null)
                throw new InvalidOperationException("PLC settings missing in appsettings.json");

            PlcService = new ModbusTcpPlcService(PlcConfig);
        }

        protected override void OnExit(ExitEventArgs e)
        {
            (PlcService as IDisposable)?.Dispose();
            base.OnExit(e);
        }
    }
}