[Solved] What does the First() method do in C# when used on a collection? - Ans: Returns the first element of the collection or throws an exception if empty | C Sharp (C#)

C Sharp (C#) - LINQ Fundamentals

What does the First() method do in C# when used on a collection?

AReturns the last element of the collection or null if empty

BReturns the first element of the collection or throws an exception if empty

CReturns all elements except the first one

DReturns the first element or default value if collection is empty

Step-by-Step Solution

Solution:

Step 1: Understand the behavior of First()
The First() method returns the first element in a collection.
Step 2: Consider empty collection case
If the collection is empty, First() throws an exception instead of returning a default value.
Final Answer:
Returns the first element of the collection or throws an exception if empty -> Option B
Quick Check:
First() behavior = Throws exception if empty [OK]

Quick Trick: First() throws if empty; use FirstOrDefault() to avoid exception [OK]

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What does the First() method do in C# when used on a collection?