Requested change

Author: yaira2

src/Files.App/Data/EventArguments/ToolbarFlyoutOpeningEventArgs.cs

@@ -7,6 +7,11 @@ namespace Files.App.Data.EventArguments
 {
 	public sealed class ToolbarFlyoutOpeningEventArgs
 	{
-		public MenuFlyout OpeningFlyout { get; set; }
+		public MenuFlyout OpeningFlyout { get; }
+
+		public ToolbarFlyoutOpeningEventArgs(MenuFlyout openingFlyout)
+		{
+			OpeningFlyout = openingFlyout;
+		}
 	}
 }

src/Files.App/ViewModels/UserControls/AddressToolbarViewModel.cs

@@ -458,7 +458,7 @@ public void PathItemSeparator_DataContextChanged(FrameworkElement sender, DataCo
 
 		public void PathboxItemFlyout_Opening(object sender, object e)
 		{
-			ToolbarFlyoutOpening?.Invoke(this, new ToolbarFlyoutOpeningEventArgs() { OpeningFlyout = (MenuFlyout)sender });
+			ToolbarFlyoutOpening?.Invoke(this, new ToolbarFlyoutOpeningEventArgs((MenuFlyout)sender));
 		}
 
 		public void PathBoxItemFlyout_Closed(object sender, object e)