增加功能：内部出错时，根据ReturnUrl参数返回

Bootstrap.Admin/Controllers/AccountController.cs

@@ -65,6 +65,8 @@ namespace Bootstrap.Admin.Controllers
         [ResponseCache(Duration = 600)]
         public ActionResult AccessDenied()
         {
+            var returnUrl = Request.Query[CookieAuthenticationDefaults.ReturnUrlParameter].ToString();
+            ViewBag.ReturnUrl = string.IsNullOrEmpty(returnUrl) ? Url.Content("~/Home/Index") : returnUrl;
             return View();
         }
         /// <summary>

Bootstrap.Admin/Views/Account/AccessDenied.cshtml

@@ -13,5 +13,5 @@
     <h1>网页拒绝访问</h1>
     <h3>您无权访问本页面请联系网站管理员授权后再查看</h3>
     <br />
-    <a href="~/Home/Index" target="_top">返回首页</a>
+    <a href="@ViewBag.ReturnUrl" target="_top">返回首页</a>
 </section>