.net core mvc 區域路由設置（配置）

寫博客原因：添加了區域（用作後臺）後,報錯：

An unhandled exception occurred while processing the request.
AmbiguousActionException: Multiple actions matched. The following actions matched route data and had all constraints satisfied:

CompanyHome.Controllers.HomeController.Index (CompanyHome)
CompanyHome.Areas.Manage.Controllers.HomeController.Index (CompanyHome)

不是很明白，大概是找不到進入那個路由吧，命名空間衝突。

總覽：

一.>>先在Startup.cs中添加對區域路由的路徑，如圖紅框內

代碼如下：

routes.MapRoute(
                    name: "areaname",
                    template: "{Manage:exists}/{controller=Home}/{action=Index}/{id?}");
                routes.MapAreaRoute(
                    name: "Manage",
                    areaName: "Manage",
                    template: "Manage/{controller=Home}/{action=Index}"
                    );

二.>>然後再給區域控制器添加如下：