Guys,

I can remake the dll, but may be there's still better way out there

I just did this :
I open My "Computer Management from the control panel".
I choose the "Services".
I stop the "IIS Admin Service" and it would efect on "World Wide Web Publishing" and that should be stop too.
Wait for seconds ... and I can remake my dll.
So I always open My Computer Management while scripting code now.

Guys, thank you for your participates ..
and ... keep progamming ...