Is there a version of the .Net Redistributable bundled with all supported versions of Windows?

Is there a specific version of .Net that I can target that is bundled with all versions of Windows of XP SP2 and higher?

We are trying to create a simple setup stub without having to resort to a low-level C/C++ app... currently something is cooked up in VB6, but there's a fair amount of low-level network code that I would much rat开发者_Python百科her rewrite in .Net -- which would be trivial if only we could rely on the presence of a given version.

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No, you cannot count on having .NET available on a XP machine. Windows Update might have been disabled. No problem on Vista (3.0) and Windows 7 (3.5 SP1).