[Solved] What does the GroupBy method do in C#? - Ans: It groups elements of a collection based on a key selector. | C Sharp (C#)

C Sharp (C#) - LINQ Fundamentals

What does the GroupBy method do in C#?

AIt sorts elements in ascending order.

BIt groups elements of a collection based on a key selector.

CIt filters elements based on a condition.

DIt removes duplicate elements from a collection.

Step-by-Step Solution

Solution:

Step 1: Understand the purpose of GroupBy
The GroupBy method organizes elements by a key, creating groups of items sharing the same key.
Step 2: Compare with other operations
Sorting arranges order, filtering selects items, and removing duplicates eliminates repeats, which are different from grouping.
Final Answer:
It groups elements of a collection based on a key selector. -> Option B
Quick Check:
GroupBy = grouping by key [OK]

Quick Trick: GroupBy always creates groups by a key, not sorting or filtering [OK]

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