Preview:
var list = Enumerable.Range(1, 10).Select(i => i * 3).ToList();
list // => [3, 6, 9, 12, 15, 18, 21, 24, 27, 30]
list.Sort((l, r) => l.ToString().CompareTo(r.ToString()));
list // => [12, 15, 18, 21, 24, 27, 3, 30, 6, 9]
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