Calculating nice chart axis ranges

I was working on a project that required calculating nice ranges for chart axes. I found a useful discussion here.

Here is what I used in C# and so far it is working adequately:

var numGridLines = 5;
var magnitude = Math.Floor(Math.Log10((maxValue - minValue) * 1.1));
var basis = Math.Pow(10, (magnitude - 1));
var margin = (maxValue - minValue) * 0.1;
var axisMax = Math.Ceiling((maxValue + margin) / basis) * basis;
var axisMin = Math.Floor((minValue - margin) / 1.1 / basis) * basis;
var majorGrid = Math.Floor((axisMax - axisMin) / basis / numGridLines) * basis;