C# Dictionary's Add() method is basically that one coworker who absolutely refuses to compromise. No graceful handling, no "hey this key already exists, want me to update it?" Just straight-up throws an ArgumentException and ruins your day.
Meanwhile, you've got perfectly reasonable alternatives like the indexer dict[key] = value that'll just upsert like a civilized data structure, or TryAdd() that politely returns false. But nah, Add() chose violence.
It's the programming equivalent of screaming "I SAID ADD IT!" while flipping the table when someone suggests maybe checking first. Classic Microsoft energy right there.
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