[Solved] Find the mistake in this code:var set = new HashSet<string>(); set.Add("cat"); set.Add("dog"); set.Remove("bird"); Console.WriteLine(set.Count); | C Sharp (C#)

C Sharp (C#) - Collections

Find the mistake in this code:

var set = new HashSet<string>();
set.Add("cat");
set.Add("dog");
set.Remove("bird");
Console.WriteLine(set.Count);

ARemove method returns false if element not found, no error.

BHashSet cannot be declared with var keyword.

CRemoving an element not in the set causes an exception.

DAdd method cannot add string elements.

Step-by-Step Solution

Solution:

Step 1: Understand Remove behavior on missing elements
Remove returns false if element is not found but does not throw an error.
Step 2: Check other options for correctness
Var is valid, Add accepts strings, and no exception occurs on Remove.
Final Answer:
Remove method returns false if element not found, no error. -> Option A
Quick Check:
HashSet Remove missing element = returns false [OK]

Quick Trick: Remove returns false if element absent, no exception thrown [OK]

Common Mistakes:

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