Try to create a prism dialog service with custom modern ui window

App/App.xaml.cs

@@ -1,4 +1,5 @@
 using System.Windows;
+using Dialogs;
 using ModernWpf;
 using ModernWpfPlayground.Types;
 using Prism.Ioc;
@@ -22,6 +23,7 @@ namespace ModernWpfPlayground
         {
             containerRegistry.Register<MainWindow>();
             containerRegistry.Register<MainWindowViewModel>();
+            containerRegistry.RegisterDialog<MessageBoxView, MessageBoxViewModel>();
         }
 
         protected override Window CreateShell()

App/MainWindow.xaml

@@ -242,6 +242,7 @@
                                         HorizontalAlignment="Stretch"
                                         Command="{Binding SaveViewModelCommand}"
                                         Content="Save" />
+                                    <Button Command="{Binding ShowDialogServiceCommand}" Content="Show dialog" />
                                 </ui:SimpleStackPanel>
                             </Grid>
                         </ScrollViewer>
@@ -275,7 +276,8 @@
                                         x:Name="TextBoxSwitch"
                                         Grid.Column="0"
                                         Width="145"
-                                        Margin="0,0,5,0">
+                                        Margin="0,0,5,0"
+                                        VerticalAlignment="Top">
                                         <ToggleButton.Style>
                                             <Style BasedOn="{StaticResource {x:Type ToggleButton}}" TargetType="ToggleButton">
                                                 <Setter Property="Content" Value="Read/Write" />
@@ -289,8 +291,12 @@
                                     </ToggleButton>
                                     <TextBox
                                         Grid.Column="1"
+                                        AcceptsReturn="True"
+                                        AcceptsTab="True"
                                         IsReadOnly="{Binding IsChecked, ElementName=TextBoxSwitch}"
-                                        Text="Eine einfache Textbox" />
+                                        MinLines="4"
+                                        Text="{Binding MultiLineText}"
+                                        TextWrapping="Wrap" />
                                 </Grid>
                                 <controls:PropertyPresenter Label="Hello" Value="{Binding BooleanValue}" />
                                 <controls:PropertyPresenter Label="Hello">

App/MainWindowViewModel.cs

@@ -3,10 +3,12 @@ using System.IO;
 using System.Threading.Tasks;
 using System.Windows;
 using System.Windows.Input;
+using Dialogs;
 using Microsoft.Win32;
 using ModernWpfPlayground.MvvmStuff;
 using ModernWpfPlayground.Types;
 using Prism.Commands;
+using Prism.Services.Dialogs;
 using YamlDotNet.Serialization;
 using static ModernWpf.ThemeManager;
 
@@ -15,14 +17,16 @@ namespace ModernWpfPlayground
     // ReSharper disable once ClassNeverInstantiated.Global
     public class MainWindowViewModel : BaseViewModel
     {
+        private readonly IDialogService _service;
         private const string AppName = "TaBEA 3.0.0";
         private string? _path;
         private string _title = AppName;
         private readonly ISerializer _serializer;
         private readonly IDeserializer _deserializer;
 
-        public MainWindowViewModel()
+        public MainWindowViewModel(IDialogService service)
         {
+            _service = service;
             ShowDialogCommand = new DelegateCommand(ShowDialog);
             CloseCommand = new DelegateCommand(() => Application.Current.Shutdown());
             OpenViewModelCommand = new DelegateCommand(LoadViewModel);
@@ -121,6 +125,25 @@ namespace ModernWpfPlayground
             set => SetProperty(value);
         }
 
+        public string MultiLineText
+        {
+            get => GetProperty("Multi line");
+            set => SetProperty(value);
+        }
+
+        public ICommand ShowDialogServiceCommand => new DelegateCommand(ShowDialogService);
+
+        private void ShowDialogService()
+        {
+            void executeCallBack(IDialogResult result)
+            {
+
+            }
+
+            _service.Show(nameof(MessageBoxView), default, executeCallBack);
+
+        }
+
         private static void SetTheme(ThemeMode themeMode) => Current.ApplicationTheme = themeMode.ToApplicationTheme();
 
         private void ShowDialog()

App/ModernWpfPlayground.csproj

@@ -9,7 +9,7 @@
 
   <ItemGroup>
     <PackageReference Include="FastMember" Version="1.5.0" />
-    <PackageReference Include="ModernWpfUI" Version="0.9.0" />
+    <PackageReference Include="ModernWpfUI" Version="0.9.1" />
     <PackageReference Include="Prism.DryIoc" Version="8.0.0.1740-pre" />
     <PackageReference Include="Prism.Wpf" Version="8.0.0.1740-pre" />
     <PackageReference Include="YamlDotNet" Version="8.1.2" />
@@ -19,6 +19,7 @@
 
   <ItemGroup>
     <ProjectReference Include="..\Controls\Controls.csproj" />
+    <ProjectReference Include="..\Dialogs\Dialogs.csproj" />
   </ItemGroup>
 
 </Project>

App/Types/AccentColors.cs

@@ -18,9 +18,9 @@ namespace ModernWpfPlayground.Types
         {
             return accentColor switch
             {
-                AccentColors.Green => Color.FromRgb(0, 86, 76),
+                AccentColors.Green => Color.FromRgb(33, 115, 70),
                 AccentColors.Yellow => Color.FromRgb(164, 144, 0),
-                AccentColors.Blue => Color.FromRgb(0, 120, 215),
+                AccentColors.Blue => Color.FromRgb(43, 87, 154),
                 AccentColors.Purple => Color.FromRgb(104, 33, 122),
                 AccentColors.Red => Color.FromRgb(183, 71, 42),
                 _ => throw new ArgumentOutOfRangeException(nameof(accentColor), accentColor, null)