SiteMapPath Stops Displaying in ASP.NET 4
问题 We have a SiteMapPath control on the page and this is bound to an XML Web.sitemap file with the default provider. We've had this site for years and have recently upgraded to ASP.NET 4.0 on IIS 7.5 on Windows 2008 R2. For some reason, after about 6-12 hours of operating (not sure exactly when, but it is consistent), the SiteMapPath stops loading for everyone. If we restart the application pool or modify and save the web.config or the web.sitemap XML files, the SiteMapPath starts loading again.