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What is the main purpose of using a HashSet<T> in C#?

easy🧠 Conceptual Q11 of 15
C Sharp (C#) - Collections
What is the main purpose of using a HashSet<T> in C#?
ATo allow duplicate elements for faster access
BTo store elements in sorted order
CTo store unique elements without duplicates
DTo store key-value pairs like a dictionary
Step-by-Step Solution
Solution:
  1. Step 1: Understand HashSet behavior

    A HashSet automatically ignores duplicate entries and stores only unique elements.
  2. Step 2: Compare with other collections

    Unlike lists or dictionaries, HashSet does not allow duplicates and does not maintain order.
  3. Final Answer:

    To store unique elements without duplicates -> Option C
  4. Quick Check:

    HashSet = Unique elements [OK]
Quick Trick: HashSet always keeps unique items only [OK]
Common Mistakes:
MISTAKES
  • Thinking HashSet keeps elements sorted
  • Assuming HashSet allows duplicates
  • Confusing HashSet with Dictionary

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