asp.net mvc 不找其他view模板，只找cshtml

asp.net mvc 默认找view文件时，依次找后辍名为aspx、ascx、cshtml、vbhtml的view文件。但是项目住住用C#+Razor开发，这样找，岂不有性能损失。

添加以下代码：

      ViewEngines.Engines.Clear();
      ViewEngines.Engines.Add(new RazorViewEngine()
      {
        AreaViewLocationFormats = new string[] { "~/Areas/{2}/Views/{1}/{0}.cshtml", "~/Areas/{2}/Views/Shared/{0}.cshtml" },
        AreaMasterLocationFormats = new string[] { "~/Areas/{2}/Views/{1}/{0}.cshtml", "~/Areas/{2}/Views/Shared/{0}.cshtml" },
        AreaPartialViewLocationFormats = new string[] { "~/Areas/{2}/Views/{1}/{0}.cshtml", "~/Areas/{2}/Views/Shared/{0}.cshtml" },
        ViewLocationFormats = new string[] { "~/Views/{1}/{0}.cshtml", "~/Views/Shared/{0}.cshtml" },
        MasterLocationFormats = new string[] { "~/Views/{1}/{0}.cshtml", "~/Views/Shared/{0}.cshtml" },
        PartialViewLocationFormats = new string[] { "~/Views/{1}/{0}.cshtml", "~/Views/Shared/{0}.cshtml" },
        FileExtensions = new string[] { "cshtml" }
      });

　　默认：

修改后：