"Security error" with threaded app

I have an app that calls a Sub via the Thread class:

            Dim POPThread As New Thread(AddressOf ProcessPOP)
            POPThread.IsBackground = True
            POPThread.Start()

The ProcessPOP sub creates a text file in the Windows temp folder (Path.GetTempPath).  After writing some data to the file, it then tries to Kill() the file.  This is generating an error:

Security error.
   at Microsoft.VisualBasic.CompilerServices.ProjectData.GetAssemblyData(Assembly assem)
   at Microsoft.VisualBasic.FileSystem.Kill(String PathName)
   at SPAMGrinderProxy.SPAMGrinderProxy.ProcessPOP() in C:\Documents and Settings\Mike\My Documents\Visual Studio Projects\SPAMGrinderProxy\SPAMGrinderProxy.vb:line 756

Yet if I pause the program in debug mode, I can manually delete this file, so I know it's not being held open.  Also, if I call the ProcessPOP sub without using a thread, this error does not occur.

Is there some type of thread security involved here that I don't know about   I seem to recall reading something about that, but not sure.

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"Security error" with threaded app

Ketaki
In VB if the CallingAssembly is different from the ExecutingAssembly the Kill call fails it appears. That means if you have a library, you won't be able to call Kill from there I think. At least that is way the ILDasm is reading. Try just doing a System.IO.File.Delete(string fileName) and see if that works instead.
Jono378
The executing assembly in this case is probably registering as whatever host the service is running underneath of then. Since VB imposes this special security, not the run-time itself, just use the run-time methods.
Jubeh
Well I'm not sure I understand why, but that worked. Since this code is all part of the same assembly (one .vb file) I'm not sure how that is causing a problem. I should have mentioned that this program runs as a service, if that matters.

Thanks.
"Security error" with threaded app

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