move core item into class library

MvvmAppCore/Interfaces/IDemoService.cs

@@ -0,0 +1,10 @@
+
+namespace MvvmAppCore.Interfaces
+{
+    public interface IDemoService
+    {
+        string Name { get; }
+
+        void Show(string name);
+    }
+}

MvvmAppCore/MvvmAppCore.csproj

@@ -0,0 +1,13 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net6.0-windows</TargetFramework>
+    <Nullable>enable</Nullable>
+    <UseWPF>true</UseWPF>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="CommunityToolkit.Mvvm" Version="8.1.0" />
+  </ItemGroup>
+
+</Project>

MvvmAppCore/ViewModels/IocPageViewModel.cs

@@ -1,11 +1,7 @@
-using MvvmCommunityApp.interfaces;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
+using MvvmAppCore.Interfaces;
 
-namespace MvvmCommunityApp.viewmodels
+
+namespace MvvmAppCore.ViewModels
 {
     public class IocPageViewModel : SamplePageViewModel
     {

MvvmAppCore/ViewModels/MainWindowViewModel.cs

@@ -2,7 +2,7 @@
 using CommunityToolkit.Mvvm.Input;
 using System;
 
-namespace MvvmCommunityApp.viewmodels
+namespace MvvmAppCore.ViewModels
 {
     public partial class MainWindowViewModel : ObservableObject
     {

MvvmAppCore/ViewModels/SamplePageViewModel.cs

@@ -1,7 +1,7 @@
 using CommunityToolkit.Mvvm.ComponentModel;
-using MvvmCommunityApp.interfaces;
+using MvvmAppCore.Interfaces;
 
-namespace MvvmCommunityApp.viewmodels
+namespace MvvmAppCore.ViewModels
 {
     public class SamplePageViewModel : ObservableObject
     {

MvvmCommunityApp.sln

@@ -5,6 +5,8 @@ VisualStudioVersion = 17.4.33213.308
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MvvmCommunityApp", "MvvmCommunityApp\MvvmCommunityApp.csproj", "{A9F79E7F-91A0-4A7D-B2AD-2AF6D3C80B4B}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MvvmAppCore", "MvvmAppCore\MvvmAppCore.csproj", "{8CFB1DAE-0565-4A86-B0CC-2D7E3C9ED053}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -15,6 +17,10 @@ Global
 		{A9F79E7F-91A0-4A7D-B2AD-2AF6D3C80B4B}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{A9F79E7F-91A0-4A7D-B2AD-2AF6D3C80B4B}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{A9F79E7F-91A0-4A7D-B2AD-2AF6D3C80B4B}.Release|Any CPU.Build.0 = Release|Any CPU
+		{8CFB1DAE-0565-4A86-B0CC-2D7E3C9ED053}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{8CFB1DAE-0565-4A86-B0CC-2D7E3C9ED053}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{8CFB1DAE-0565-4A86-B0CC-2D7E3C9ED053}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{8CFB1DAE-0565-4A86-B0CC-2D7E3C9ED053}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

MvvmCommunityApp/App.xaml.cs

@@ -1,8 +1,8 @@
 using CommunityToolkit.Mvvm.DependencyInjection;
 using Microsoft.Extensions.DependencyInjection;
-using MvvmCommunityApp.interfaces;
+using MvvmAppCore.ViewModels;
 using MvvmCommunityApp.services;
-using MvvmCommunityApp.viewmodels;
+using MvvmAppCore.Interfaces;
 using System;
 using System.Windows;
 

MvvmCommunityApp/MainWindow.xaml.cs

@@ -1,9 +1,5 @@
 using CommunityToolkit.Mvvm.DependencyInjection;
-using MvvmCommunityApp.viewmodels;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
+using MvvmAppCore.ViewModels;
 using System.Windows;
 
 

MvvmCommunityApp/MvvmCommunityApp.csproj

@@ -16,4 +16,8 @@
     <Folder Include="views\" />
   </ItemGroup>
 
+  <ItemGroup>
+    <ProjectReference Include="..\MvvmAppCore\MvvmAppCore.csproj" />
+  </ItemGroup>
+
 </Project>

MvvmCommunityApp/interfaces/IDemoService.cs

@@ -1,15 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace MvvmCommunityApp.interfaces
-{
-    public interface IDemoService
-    {
-        string Name { get; }
-
-        void Show(string name);
-    }
-}

MvvmCommunityApp/services/DemoService.cs

@@ -1,4 +1,4 @@
-using MvvmCommunityApp.interfaces;
+using MvvmAppCore.Interfaces;
 using System;
 using System.Collections.Generic;
 using System.Linq;