https://learn.microsoft.com/en-us/dotnet/api/microsoft.visualstudio.shell.interop.removebfdirection?view=visualstudiosdk-2022
RemoveBFDirection Enum (Microsoft.VisualStudio.Shell.Interop) | Microsoft Learn
Specifies the direction for removal of a navigation item. Used with RemoveAdjacentBFNavigationItem(RemoveBFDirection) and...
enummicrosoftvisualstudioshellinterop