You already imported and used it with using System.Linq;. What matters is that you do not need an additional iteration with .ToList() just to call .ForEach(), that is what .Aggregate() does for you in a single loop. Good idea for the next article.
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I am aware that I could have used LINQ, I thought about using LINQ. However it would not be very beginner friendly.
Additionally I might have a LINQ specific blog/tut planned ;)
You already imported and used it with
using System.Linq;. What matters is that you do not need an additional iteration with.ToList()just to call.ForEach(), that is what.Aggregate()does for you in a single loop. Good idea for the next article.