Getting UnAuthorizedAccessException while deleting a temp dll

Question

Hi I'm creating a dll at run time and after using that dll finally I'm trying to delete that dll at run time but I'm getting UnAuthorizedAccessException . File.Delete(location). But once after the application is closed and if I try to delete that file while the application is loaded then that dll is getting deleted at run time only. Can anyone please tell the solution. Regards Ramana

Vulpes · Answer

If the dll is still loaded into your application's memory then the file will be locked and you won't be able to delete it whilst the application is still running. The only way to delete it at runtime is to load it into a separate application domain (possibly what you're doing already) and then to unload the application domain. You should then be able to delete the file.

Sam Hobbs · Answer

Can you clarify what you mean by  creating a dll at run time ? My guess is that you do not mean what I think you mean. Creating a DLL requires advanced knowledge of Windows. If what you mean by using that dll means you are using LoadLibrary (or are using something that results in using LoadLibrary) then ensure that there is a FreeLibrary corresponding with every LoadLibrary. If you are trying to delete the DLL file in the same program and the same execution of that program then be sure to Dispose of the object used to create the file after the file is created but in my experience that might not be enough.