Unable to copy ... because it is being used by another process.

[ckincincy]

I typically debug using Attach to Process. So the website I am coding on is always running on my machine.

When I build the website for the first time, no issues. However after I do a function that results in Pechkin to be utilized I can't build again.

I get this error on the second build:
Unable to copy file ".... wkkthmltox0.dll" to bin\wkhtmltox0.dll". The process cannot access the file '\bin\wkhtmltox0.dll' because it is being used by another process.

I get that same error for all dlls installed via the NUGET package.

The only way I can build the application again is to manually kill the w3wp.exe process.

Any thoughts?

[gmanny]

I think, as @Kons said in #12 (comment)

the web server process doesn't shut down and the native libraries aren't unloaded

I'm not familiar with web development with .net, so I can't really propose any fix to it.

[stirrblig]

Just right click the DLL's in the solution explorer and select Properties.
By default, Copy To Output Directory is set to 'Copy Always'.
Change this to 'Copy If Newer' and you're fine.

[mattki]

Thanks stirrblig, that worked for me in visual studio 2012

[humanbeinc]

Not working for me ( VS 2010 / Development Server )

[ckincincy]

Then you did something not quite right as that completely prevents the error. Not possible to reproduce if you don't copy the dll.

[humanbeinc]

Sry, wrong thread. Wanted to post to the "hanging" in iis thread..

[aloksharma1]

if you have used nuget package to download simple cut paste to folder it will be their permanently(in VS 2010)

[tuespetre]

This problem should be resolved in my pull request here: #42