or download this
var sortedPerlVersions = perlVersions
.Select(x => new { full = x, parts = x.Split('.').Select(n => Conv
+ert.ToInt32(n)).ToArray() })
.OrderBy(x => x.parts[0]).ThenBy(x => x.parts[1]).ThenBy(x => x.pa
+rts[2])
.Select(x => x.full)
.ToList();