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Asked: 2026-06-01T22:25:43+00:00

I’m trying to combine List<string> strings using string.Join(,, strings) but everything I’m reading says

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I’m trying to combine List<string> strings using string.Join(",", strings) but everything I’m reading says I should do:

string.Join(",", strings.ToArray())

Is there a certain reason I have to/should use .ToArray()?

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1 Answer

  1. Editorial Team

    string.Join only started accepting IEnumerable<string> (and indeed a generic overload) as of .NET 4. Presumably you’re looking at code (or instructions) written with .NET 3.5 or earlier in mind. Compare the overloads:

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