avalonia: added some exception handling

PRS.Avalonia/PRS.Avalonia/App.axaml.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Linq;
+using System.Threading.Tasks;
 using Avalonia;
 using Avalonia.Controls;
 using Avalonia.Controls.ApplicationLifetimes;
@@ -19,6 +20,9 @@ public class App : Application
 
     public override void Initialize()
     {
+        TaskScheduler.UnobservedTaskException += TaskScheduler_UnobservedTaskException;
+        MobileLogging.LogException += MobileLogging_LogException;
+
         CoreUtils.RegisterClasses();
         ComalUtils.RegisterClasses();
         CoreUtils.RegisterClasses(typeof(App).Assembly);
@@ -26,9 +30,19 @@ public class App : Application
         AvaloniaXamlLoader.Load(this);
     }
 
+    private void MobileLogging_LogException(Exception ex, string? tag)
+    {
+        HandleException(ex);
+    }
+
+    private void TaskScheduler_UnobservedTaskException(object? sender, UnobservedTaskExceptionEventArgs e)
+    {
+        HandleException(e.Exception);
+    }
+
     public static void HandleException(Exception e)
     {
-        MobileLogging.Log(CoreUtils.FormatException(e));
+        MobileLogging.LogError(CoreUtils.FormatException(e));
     }
 
     public override void OnFrameworkInitializationCompleted()