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ThreadAbortException in ASP.Net 4 file descriptor leak?

In case our file server runs slowly and the page does not finish by its timeout, ASP.Net will hit it with a ThreadAbortException exception. If this happens inside Win32Native.CreateFile, this leaves the file descriptor locked until we execute iisreset.

Is this a .NET flaw? Is there anything we can do in this case, apart from bad ideas, such as raising the timeout to some gigantic number ... I don’t think ThreadAbort.Reset will help, because the damage has already been done and I didn’t even return the file descriptor from FileStream to close it myself.

at Microsoft.Win32.Win32Native.CreateFile (String lpFileName, Int32 dwDesiredAccess, FileShare dwShareMode, SECURITY_ATTRIBUTES securityAttrs, FileMode dwCreationDisposition, Int32 dwFlagsAndAttributes, IntPtr hTemplate)

at Microsoft.Win32.Win32Native.SafeCreateFile (String lpFileName, Int32 dwDesiredAccess, FileShare dwShareMode, SECURITY_ATTRIBUTES securityAttrs, FileMode dwCreationDisposition, Int32 dwFlagsAndAttributes, IntPtr hTemplate

in System.IO.FileStream.Init (String path, FileMode mode, access to FileAccess, Int32 rights, useRights boolean, FileShare share, Int32 bufferSize, FileOptions, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy, Boolean useLongPath)

System.IO.FileStream..ctor( String, FileMode, FileAccess, FileShare, Int32 bufferSize, FileOptions, String msgPath, Boolean bFromProxy)

System.IO.FileStream..ctor( String, FileMode)

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, Microsoft Connect :

http://connect.microsoft.com/VisualStudio/feedback/details/739044/threadabortexception-in-asp-net-4-during-new-filestream-leaking-file-handle

Microsoft:

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, finally using?

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