created and mapped ShellViewModel and according View

MultiTerm.Core/MultiTerm.Core.csproj

@@ -8,7 +8,6 @@
 
   <ItemGroup>
     <Folder Include="Model\" />
-    <Folder Include="ViewModel\" />
   </ItemGroup>
 
   <ItemGroup>

MultiTerm.Core/ViewModel/ShellViewModel.cs

@@ -0,0 +1,9 @@
+using CommunityToolkit.Mvvm.ComponentModel;
+
+namespace MultiTerm.Core.ViewModel;
+
+public partial class ShellViewModel : ObservableObject
+{
+    [ObservableProperty]
+    private string title = "ShellView Test";
+}

MultiTerm.Wpf/App.xaml.cs

@@ -1,5 +1,6 @@
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Hosting;
+using MultiTerm.Core.ViewModel;
 using System.Windows;
 
 namespace MultiTerm.Wpf;
@@ -17,7 +18,7 @@ public partial class App : Application
                 services.AddSingleton<MainWindow>();
 
                 // viewmodels
-                //services.AddTransient<SendReceiveViewModel>();
+                services.AddSingleton<ShellViewModel>();
             })
             .Build();
     }

MultiTerm.Wpf/MainWindow.xaml

@@ -4,9 +4,9 @@
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
         xmlns:local="clr-namespace:MultiTerm.Wpf"
+        xmlns:vm="clr-namespace:MultiTerm.Core.ViewModel;assembly=MultiTerm.Core"
+        xmlns:v="clr-namespace:MultiTerm.Wpf.View"
         mc:Ignorable="d"
         Title="MultiTerm" Height="450" Width="800">
-    <Grid>
-
-    </Grid>
+    <v:ShellView/>
 </Window>

MultiTerm.Wpf/MultiTerm.Wpf.csproj

@@ -8,12 +8,12 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <Folder Include="View\" />
+    <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="7.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Hosting" Version="7.0.1" />
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="7.0.0" />
-    <PackageReference Include="Microsoft.Extensions.Hosting" Version="7.0.1" />
+    <ProjectReference Include="..\MultiTerm.Core\MultiTerm.Core.csproj" />
   </ItemGroup>
 
 </Project>

MultiTerm.Wpf/View/ShellView.xaml

@@ -0,0 +1,12 @@
+<UserControl x:Class="MultiTerm.Wpf.View.ShellView"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
+             xmlns:local="clr-namespace:MultiTerm.Wpf.View"
+             mc:Ignorable="d" 
+             d:DesignHeight="450" d:DesignWidth="800">
+    <Grid>
+        <Label Content="{Binding Title}"/>
+    </Grid>
+</UserControl>

MultiTerm.Wpf/View/ShellView.xaml.cs

@@ -0,0 +1,13 @@
+using MultiTerm.Core.ViewModel;
+using System.Windows.Controls;
+
+namespace MultiTerm.Wpf.View;
+
+public partial class ShellView : UserControl
+{
+    public ShellView()
+    {
+        InitializeComponent();
+        this.DataContext = App.AppHost!.Services.GetService(typeof(ShellViewModel));
+    }
+}