.net core mvc 区域路由设置（配置）

写博客原因：添加了区域（用作后台）后,报错：

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，大概是找不到进入那个路由吧，命名空间冲突。

总览：

一.>>先在startup.cs中添加对区域路由的路径，如图红框内

代码如下：

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.>>然后再给区域控制器添加如下：