[Solved] What will be the output of this code?var list = new List<int> { 5, 10, 15 }; var result = list.SingleOrDefault(x => x == 10); Console.WriteLine(result); | C Sharp (C#)

C Sharp (C#) - LINQ Fundamentals

What will be the output of this code?

var list = new List<int> { 5, 10, 15 };
var result = list.SingleOrDefault(x => x == 10);
Console.WriteLine(result);

A10

B0

CThrows exception

Dnull

Step-by-Step Solution

Solution:

Step 1: Understand SingleOrDefault with predicate
SingleOrDefault returns the only element matching predicate or default if none, throws if multiple.
Step 2: Check list and predicate
List has one element equal to 10, so SingleOrDefault returns 10.
Final Answer:
10 -> Option A
Quick Check:
SingleOrDefault returns single matching element = 10 [OK]

Quick Trick: SingleOrDefault returns single match or default, throws if many [OK]

Common Mistakes:

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