c# - How convert ToList method to LINQ expression -



c# - How convert ToList method to LINQ expression -

list<string> tolist(string[] names) { list<string> l = new list<string>(); foreach (string n in names) { l.add(n.toupper()); l.add(n.tolower()); } homecoming l; }

how convert tolist method linq expression(method syntax). help much appreciated. thanks.

names.selectmany(x => new[] { x.tolower(), x.toupper() }).tolist()

c# linq

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