Nice discussion going on here and lots of confusion.

The VFP OLE DB Provider is not thread safe. I would not consider using VFP with WCF services. I believe Rick Strahl has posted some things about it here on the UT.

>I must admit that I'm a bit biased against using either of these drivers and prefer moving data to SQL Server instead.
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>I'm pretty darn sure that the VFP ODBC driver is not thread-safe. What about the VFP OleDb driver? I've actually never used it. How does it hold up when used by WCF services? How robust is it?
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>Ideas on either of these two drivers is appreciated.