try to implement MessageBox

Launcher.Client.Avalonia/GUI/LauncherWindow.axaml.cs

@@ -27,6 +27,14 @@ public partial class LauncherWindow : Window
         SelectTab(LibraryButton, null);
         FillProgramsPanel();
         Logger.Log("launcher started");
+        try
+        {
+            throw new Exception("aaa");
+        }
+        catch (Exception ex)
+        {
+            LogError("main window", ex);
+        }
     }
 
     void LogHandler(string m) => Dispatcher.UIThread.InvokeAsync(()=>LogBox.Text += m);

Launcher.Client.Avalonia/GUI/MessageBox.axaml

@@ -3,7 +3,23 @@
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-        Title="MessageBox"
-        d:DesignHeight="450"
-        d:DesignWidth="800"
-        mc:Ignorable="d" />
+        mc:Ignorable="d" 
+        Height="100"
+        Width="200"
+        Background="{DynamicResource MyBackgroundColor}">
+        <Grid>
+                <Grid.RowDefinitions>* 30</Grid.RowDefinitions>
+                <TextBox Name="TextBlock" HorizontalAlignment="Stretch" VerticalAlignment="Stretch"
+                         Foreground="{DynamicResource MyWhite}"
+                         
+                         ScrollViewer.VerticalScrollBarVisibility="Auto"
+                         IsReadOnly="True" TextWrapping="Wrap"
+                         FontSize="14"/>    
+                <Button Grid.Row="1" Click="Button_OnClick" 
+                        HorizontalAlignment="Center" VerticalAlignment="Bottom"
+                        Foreground="{DynamicResource MyWhite}"
+                        FontSize="16">
+                    OK
+                </Button>
+        </Grid>
+</Window>

Launcher.Client.Avalonia/GUI/MessageBox.axaml.cs

@@ -1,4 +1,6 @@
-namespace Launcher.Client.Avalonia.GUI;
+using Avalonia.Interactivity;
+
+namespace Launcher.Client.Avalonia.GUI;
 
 public partial class MessageBox : Window
 {
@@ -9,6 +11,15 @@ public partial class MessageBox : Window
 
     public static void Show(string title, string text)
     {
-        throw new NotImplementedException();
+        var mb = new MessageBox();
+        mb.Title = title;
+        mb.TextBlock.Text = text;
+        mb.Topmost = true;
+        mb.Show();
+    }
+
+    private void Button_OnClick(object sender, RoutedEventArgs e)
+    {
+        this.Close();
     }
 }