I am migrating a project from .NET 4.7.2 to .NET 7.0, and some of the class libraries reference IHierarchicalEnumerable and IHierarchyData, which were contained in the namespace System.Web.UI.
I know this reference is not supported in .NET Core, so are there alternatives or how I can use these interfaces please?
I thought maybe using Microsoft.AspNetCore.SystemWebAdapters would solve the issue, but it does not seem to make a difference.
I also thought maybe using Microsoft.AspNetCore.Mvc.Rendering might contain the interfaces, but it does not.