Fix: Fixed COMException with BaseLayoutPage.GetAllItems (files-commun…

…ity#14431)

src/Files.App/Views/Layouts/BaseLayoutPage.cs

@@ -1294,19 +1294,21 @@ private void UpdateCollectionViewSource()
 
 			if (ParentShellPageInstance.FilesystemViewModel.FilesAndFolders.IsGrouped)
 			{
-				CollectionViewSource = new()
+				var newSource = new CollectionViewSource()
 				{
 					IsSourceGrouped = true,
 					Source = ParentShellPageInstance.FilesystemViewModel.FilesAndFolders.GroupedCollection
 				};
+				CollectionViewSource = newSource;
 			}
 			else
 			{
-				CollectionViewSource = new()
+				var newSource = new CollectionViewSource()
 				{
 					IsSourceGrouped = false,
 					Source = ParentShellPageInstance.FilesystemViewModel.FilesAndFolders
 				};
+				CollectionViewSource = newSource;
 			}
 		}