[Solved] What will be the output of the following C# code?var set = new HashSet<string>(); set.Add("apple"); set.Add("banana"); set.Add("apple"); Console.WriteLine(set.Count); | C Sharp (C#)

C Sharp (C#) - Collections

What will be the output of the following C# code?

var set = new HashSet<string>();
set.Add("apple");
set.Add("banana");
set.Add("apple");
Console.WriteLine(set.Count);

A0

B3

C1

D2

Step-by-Step Solution

Solution:

Step 1: Add elements to HashSet
"apple" is added first, then "banana", then "apple" again.
Step 2: Understand duplicate handling
The second "apple" is ignored because HashSet stores unique elements only.
Final Answer:
2 -> Option D
Quick Check:
Duplicates ignored, count = 2 [OK]

Quick Trick: Count equals unique items added, duplicates ignored [OK]

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