参数化范围上限列表…
var ceilings = new[] { 10, 100, 500 };var groupings = items.GroupBy(item => ceilings.First(ceiling => ceiling >= item));
参数化范围上限列表…
var ceilings = new[] { 10, 100, 500 };var groupings = items.GroupBy(item => ceilings.First(ceiling => ceiling >= item));