CODEWITHSUNDEEP
c#copybuffersystem.io.file
Roka545
Roka545

Reputation: 3636

Change File.Copy default buffer size.

I'm looking into ways to possibly improve file transfer speeds to a network drive. I'm currently using the standard File.Copy. Does anyone know the default buffer size for File.Copy and if it's possible to change it?

Upvotes: 0

Views: 406

Answers (1)

Camilo Terevinto
Camilo Terevinto

Reputation: 32053

Given that File.Copy uses Window's copy functions, as you can see in the source code:

internal const String KERNEL32 = "kernel32.dll";

[DllImport(KERNEL32, SetLastError=true, CharSet=CharSet.Auto, BestFitMapping=false)]
[ResourceExposure(ResourceScope.Machine)]
internal static extern bool CopyFile(...)

...
bool r = Win32Native.CopyFile(fullSourceFileName, fullDestFileName, !overwrite);

There's not a lot (in fact, nothing) you can do to optimize this.

Upvotes: 3

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