[Solved] Why does SingleOrDefault() throw an exception when multiple elements match the predicate? - Ans: Because it expects zero or one matching element only | C Sharp (C#)

C Sharp (C#) - LINQ Fundamentals

Why does SingleOrDefault() throw an exception when multiple elements match the predicate?

ABecause it returns default value for multiple matches

BBecause it always returns the first element

CBecause it cannot handle empty collections

DBecause it expects zero or one matching element only

Step-by-Step Solution

Solution:

Step 1: Understand SingleOrDefault() contract
It expects zero or one element matching the predicate.
Step 2: Behavior on multiple matches
If more than one element matches, it throws to signal ambiguous result.
Final Answer:
Because it expects zero or one matching element only -> Option D
Quick Check:
SingleOrDefault() throws on multiple matches [OK]

Quick Trick: SingleOrDefault() allows zero or one match only [OK]

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