DllImport and ASP.NET

Question

Hi, I'm having some problems with DllImport and ASP.NET because when I use a imported method ASP.NET loads the Dll and locks the file even after it finished using it. Is there any way to force ASP.NET to release the lock on the file?

Answer 1

The only way to force a DLL out of the process in .Net is to unload the AppDomain in which the Dll is loaded. Unless you create a separate AppDomain in which run the DllImport code this will not be possible.

Also I know this policy applies to managed DLL's. I am not 100% sure if this applies to DLL's loaded via PINvoke but I am fairly certain.

Answer 2

Only if you create a new AppDomain and load the dll into the domain. Afterwards you can unload the AppDomain and the dll will be unloaded.