![writing a dll file writing a dll file](https://www.howtogeek.com/wp-content/uploads/2016/11/wdi_3.png)
When opening the web page, the error details are as follows:ĭescription: An error occurred during the compilation of a resource required to service this request. It Will be explainedc in the follow-up solution. It is easy to mislead people, thinking that there is no permission to access the App_Web_3.dll file, or no permission to modify a folder in the path. The error prompts 'c:\windows\Microsoft.NET\Framework\v9\Temporary ASP.NET Files\root\9218c35c\1d16c6e1\App_Web_3.dll' - 'Access is denied'. Generally speaking, after configuring website server permissions, the error "CS0016: Could not write to output file is denied access-Access is denied" is easy to appear in.