Multiple choice

Which one of the following is not a C# reserved keyword?

  1. Is

  2. Of

  3. As

  4. In
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

'Of' is not a reserved keyword in C#. Is, As, and In are all contextual keywords/reserved words. 'Of' is only used in generic type constraints (where T : IEnumerable) but is not a standalone keyword.

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