What happens when this C# code runs: int? n = null; int x = n.Value;?
Correct answer D. An InvalidOperationException is thrown
Explanation
The code compiles because Nullable.Value is an int. At run time, however, Value throws InvalidOperationException when HasValue is false. It does not quietly return 0; that is what GetValueOrDefault() does. Safer patterns are int x = n ?? 0; or checking if (n.HasValue) or n is int v before reading the value.
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