Group by variable integer range using Linq

Question

I\'m trying to group a set of data based on the range of an integer, by the range does not increase at a fixed interval.

e.g. I have

Item ID Price

Answer 1

Parameterizing the list of range ceilings...

var ceilings = new[] { 10, 100, 500 };
var groupings = items.GroupBy(item => ceilings.First(ceiling => ceiling >= item));