implemented DI for MainWindow,

added MVVM package for Backend

MultiTerm.Core/MultiTerm.Core.csproj

@@ -6,4 +6,13 @@
     <Nullable>enable</Nullable>
   </PropertyGroup>
 
+  <ItemGroup>
+    <Folder Include="Model\" />
+    <Folder Include="ViewModel\" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="CommunityToolkit.Mvvm" Version="8.1.0" />
+  </ItemGroup>
+
 </Project>

MultiTerm.Wpf/App.xaml

@@ -1,8 +1,7 @@
 <Application x:Class="MultiTerm.Wpf.App"
              xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
-             xmlns:local="clr-namespace:MultiTerm.Wpf"
-             StartupUri="MainWindow.xaml">
+             xmlns:local="clr-namespace:MultiTerm.Wpf">
     <Application.Resources>
          
     </Application.Resources>

MultiTerm.Wpf/App.xaml.cs

@@ -1,17 +1,42 @@
-using System;
-using System.Collections.Generic;
-using System.Configuration;
-using System.Data;
-using System.Linq;
-using System.Threading.Tasks;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Hosting;
 using System.Windows;
 
-namespace MultiTerm.Wpf
-{
-    /// <summary>
-    /// Interaction logic for App.xaml
-    /// </summary>
+namespace MultiTerm.Wpf;
+
 public partial class App : Application
 {
+    public static IHost? AppHost { get; private set; }
+
+    public App()
+    {
+        // create dependency injection host
+        AppHost = Host.CreateDefaultBuilder()
+            .ConfigureServices((hostContext, services) =>
+            {
+                services.AddSingleton<MainWindow>();
+
+                // viewmodels
+                //services.AddTransient<SendReceiveViewModel>();
+            })
+            .Build();
     }
+
+    protected override async void OnStartup(StartupEventArgs e)
+    {
+        await AppHost!.StartAsync();
+
+        // instanciate startup form and show
+        var startupForm = AppHost.Services.GetRequiredService<MainWindow>();
+        startupForm.Show();
+
+        base.OnStartup(e);
+    }
+
+    protected override async void OnExit(ExitEventArgs e)
+    {
+        await AppHost!.StopAsync();
+        base.OnExit(e);
+    }
+
 }

MultiTerm.Wpf/MainWindow.xaml.cs

@@ -1,23 +1,7 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-using System.Windows;
-using System.Windows.Controls;
-using System.Windows.Data;
-using System.Windows.Documents;
-using System.Windows.Input;
-using System.Windows.Media;
-using System.Windows.Media.Imaging;
-using System.Windows.Navigation;
-using System.Windows.Shapes;
+using System.Windows;
+
+namespace MultiTerm.Wpf;
 
-namespace MultiTerm.Wpf
-{
-    /// <summary>
-    /// Interaction logic for MainWindow.xaml
-    /// </summary>
 public partial class MainWindow : Window
 {
     public MainWindow()
@@ -25,4 +9,3 @@ namespace MultiTerm.Wpf
         InitializeComponent();
     }
 }
-}

MultiTerm.Wpf/MultiTerm.Wpf.csproj

@@ -7,4 +7,13 @@
     <UseWPF>true</UseWPF>
   </PropertyGroup>
 
+  <ItemGroup>
+    <Folder Include="View\" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="7.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Hosting" Version="7.0.1" />
+  </ItemGroup>
+
 </Project>