path fix

VisionBuilder.UI.Blazor.Uno/Components/Layout/MainLayout.razor.cs

@@ -47,6 +47,7 @@ public partial class MainLayout : IDisposable
     };
 
     private MudTheme _currentTheme = null!;
+    private bool _disposed;
 
     protected override void OnInitialized()
     {
@@ -71,6 +72,7 @@ public partial class MainLayout : IDisposable
 
     private async void OnPropertyChanged(object? sender, PropertyChangedEventArgs e)
     {
+        if (_disposed) return;
         if (e.PropertyName == nameof(MainWindowVM.TestMode))
         {
             _testMode = MainWindowVm.TestMode;
@@ -98,6 +100,7 @@ public partial class MainLayout : IDisposable
 
     public void Dispose()
     {
+        _disposed = true;
         MainWindowVm.PropertyChanged -= OnPropertyChanged;
     }
 }