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    "Constructor injection ... has no advantage over method injection" this is incorrect - it has the two advantages I listed in my answer: It forces variable initialization and potential detects cyclic dependencies (as you are unable to sequence the constructor calls if a cyclic dependency exists). Commented Apr 19, 2023 at 8:04
  • FWIW, you could also say method injection has the advantage of allowing cyclical dependencies, if you're into that sort of thing! Commented Apr 19, 2023 at 21:39
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    I do not encourage the method injection example provided here, especially when writer is shared. Commented Apr 20, 2023 at 8:03
  • @S.D. care to elaborate? Commented Apr 20, 2023 at 17:21
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    to @DavidT comment - constructor injection also addresses the general Inversion of Control (IOC) abstraction. Commented Apr 20, 2023 at 23:02