Re: Overlapped file IO

Yes it does (except on Windows 9x). For FileStream, use the constructor:

public FileStream(string path, FileMode mode, FileSystemRights rights,
FileShare share, int bufferSize, FileOptions options)

Make sure you pass in FileOptions.Asynchronous. Then, use
BeginRead/Write and EndRead/Write. This uses overlapped I/O. (The only
part that is still synchronous is the constructor since there is no
async version of the underlying CreateFile Win32 call.)

Other classes such as Socket also use overlapped I/O when you use
BeginXXX/EndXXX. In the case of Socket and others, you don't need to
pass any special flags in like you have to with FileStream's
FileOptions.

-----Original Message-----
From: Discussion of development on the .NET platform using any managed
language [mailto:[email protected]] On Behalf Of Alex
Ivanoff
Sent: Monday, November 19, 2007 2:44 PM
To: [email protected]
Subject: [DOTNET-CLR] Overlapped file IO

Does .NET 2.0 have support for overlapped IO or do I need to implement
one myself?

Alex

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