René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"ASP.NET Core 2.2.0 Preview 3 known issues","articleBody":"Known issues in ASP.NET / Entity Framework Core 2.2 Preview 3\r\n========\r\n\r\nTo see all issues closed in the 2.2.0 Preview 3 milestone, see the results of [this query](https://github.com/search?q=org%3Aaspnet+is%3Aissue+is%3Aclosed+milestone%3A2.2.0-preview3).\r\n\r\nOfficial announcement blog post: https://blogs.msdn.microsoft.com/webdev/2018/10/17/asp-net-core-2-2-0-preview3-now-available/\r\n\r\nPlease see below for a list of known issues in the 2.2.0 Preview 3 release.\r\n\r\n---\r\n\r\n## Some external CSS styles are failing to load for new Razor and MVC projects:\r\n\r\nWhen running a newly created MVC or Razor Pages project, some styles do not render.\r\n\r\nThis is caused by an integrity check failure for some of the referenced stylesheets. To fix the issue add a `crossorigin=\"anonymous\"` attribute to the `bootstrap.min.css` referencing `\u003clink ...\u003e` tag in the `_Layout.cshtml` file, as follows:\r\n\r\n```html\r\n\u003clink rel=\"stylesheet\" href=\"https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.1.3/css/bootstrap.min.css\" \r\n\tasp-fallback-href=\"~/lib/bootstrap/dist/css/bootstrap.min.css\" \r\n\tasp-fallback-test-class=\"sr-only\" asp-fallback-test-property=\"position\" asp-fallback-test-value=\"absolute\" \r\n\tcrossorigin=\"anonymous\" \r\n\tintegrity=\"sha256-eSi1q2PG6J7g7ib17yAaWMcrr5GrtohYChqibrV7PBE=\"/\u003e\r\n```\r\n\r\n---\r\n\r\n## URL generation for conventional routes with default values is invalid\r\n\r\nIn an MVC project using Endpoint Routing, URL generation using `IUrlHelper` can generate a URL incorrectly when the route template includes default values.\r\n\r\nExample:\r\n```\r\napp.UseMvc(routes =\u003e\r\n{\r\n    routes.MapRoute(\"default\", \"{controller=Home}/{action=Index}/{id?}\");\r\n});\r\n```\r\n\r\n```\r\nUrl.Action(\"Index\", \"Home\", new { id = 17 });\r\n```\r\n\r\nThis can result in the following URL being generated `/?id=17` - this will work with most uses of MVC but the result of `/Home/Index/17` is intended.\r\n\r\n---\r\n\r\n## NullReferenceException thrown when using IHttpClientFactory\r\n\r\nCrashes can occur due to a bug in how cleanup timers are incorrectly started when using `IHttpClientFactory`. This can be worked around by setting `HttpClientFactoryOptions.HandlerLifetime` to an extremely long value or `Timeout.InfiniteTimespan`. \r\n\r\nhttps://github.com/aspnet/HttpClientFactory/issues/194\r\n\r\n---\r\n\r\nFor discussions, please go to https://github.com/aspnet/AspNetCore/issues/3642","author":{"url":"https://github.com/Eilon","@type":"Person","name":"Eilon"},"datePublished":"2018-10-17T16:31:22.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/323/Announcements/issues/323"}