FeatureLocationExpander.cs

using System.Collections.Generic;
using Microsoft.AspNetCore.Mvc.Razor;

namespace FeatureFolderStructureDemo.StartupCustomizations
{
    public class FeatureLocationExpander : IViewLocationExpander
    {
        public void PopulateValues(ViewLocationExpanderContext context)
        {
            // Don't need anything here, but required by the interface
        }
        
        public IEnumerable<string> ExpandViewLocations(ViewLocationExpanderContext context, IEnumerable<string> viewLocations)
        {
            // The old locations are /Views/{1}/{0}.cshtml and /Views/Shared/{0}.cshtml where {1} is the controller and {0} is the name of the View
            // Replace /Views with /Features
            return new string[] {"/Features/{1}/{0}.cshtml", "/Features/Shared/{0}.cshtml"};
        }
    }
}