App.xaml.cs

@@ -1,8 +1,37 @@
-using System.Windows;
+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);
+        }
     }
 }