[Solved] Identify the error in this code snippet using HashSet<int>:HashSet<int> numbers = new HashSet<int>(); numbers.Add(1); numbers.Add(2); numbers.Add(1); Console.WriteLine(numbers[0]); | C Sharp (C#)

C Sharp (C#) - Collections

Identify the error in this code snippet using HashSet<int>:

HashSet<int> numbers = new HashSet<int>();
numbers.Add(1);
numbers.Add(2);
numbers.Add(1);
Console.WriteLine(numbers[0]);

AHashSet does not support indexing with []

BCannot add duplicate values to HashSet

CHashSet must be initialized with values

DAdd method returns void, cannot be used like this

Step-by-Step Solution

Solution:

Step 1: Review HashSet usage
HashSet stores unique elements but does not support accessing elements by index.
Step 2: Identify invalid operation
Using numbers[0] causes a compile-time error because HashSet has no indexer.
Final Answer:
HashSet does not support indexing with [] -> Option A
Quick Check:
No index access on HashSet [OK]

Quick Trick: HashSet has no indexer; use foreach or Contains [OK]

Common Mistakes:

MISTAKES

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Identify the error in this code snippet using HashSet<int>: