MS Chart: Axis scale view has extra margin

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C#

MSChart

I'm using the MS Chart controls for .Net 3.5, and trying to use its automatic axis view selection feature:

mainChartArea.CursorX.IsUserSelectionEnabled = mainChartArea.CursorY.IsUserSelectionEnabled = true;

This works okay, but on the X axis, the visible range has an extra margin on both sides beyond what was actually selected, typically of 1 unit (so if I select 1.6 to 3.2, it will show 0.6 to 4.2). It appears there is a private 'marginView' in the Axis class which gets set internally that causes this to happen, and I don't see a way of turning that off.

The Y axis has a margin of zero and the view selection works perfectly.

So my question is: has anyone else had this problem, and what did you do to fix or work around it?