[Solved] What happens if you add duplicate keys in a dictionary initializer like this?var dict = new Dictionary<string, int>() { {"a", 1}, {"a", 2} }; | C Sharp (C#)

C Sharp (C#) - Collections

What happens if you add duplicate keys in a dictionary initializer like this?

var dict = new Dictionary<string, int>() { {"a", 1}, {"a", 2} };

ACompilation error due to duplicate keys

BLast value overwrites previous for the key

CRuntime exception thrown

DDictionary stores both entries with same key

Step-by-Step Solution

Solution:

Step 1: Understand dictionary initializer behavior
Duplicate keys in initializer cause runtime ArgumentException.
Step 2: Analyze options
Compilation succeeds but runtime throws exception; dictionary cannot have duplicate keys.
Final Answer:
Runtime exception thrown -> Option C
Quick Check:
Duplicate keys cause runtime exception [OK]

Quick Trick: Duplicate keys cause runtime error, not overwrite [OK]

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