Thank you everyone who offered suggestions. One of the Numpy for .NET developers confirmed that the project is pretty much dead, and also that there is no way to get a .NET array into a Numpy ndarray without copying the values. (See https://mail.enthought.com/pipermail/scipy4dotnet/2012-December/000165.html)
The latter is a non-starter for me, I have some very large arrays I want to work with and copying them in IronPython code is not realistic. I have figured out how to get the data into CPython and I'm working with it there. Kent
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