[Solved] How can you update the value for an existing key in a Dictionary without causing an exception? - Ans: Use the indexer to assign the new value directly | C Sharp (C#)

C Sharp (C#) - Collections

How can you update the value for an existing key in a Dictionary without causing an exception?

AUse the indexer to assign the new value directly

BUse Add() method with the key and new value

CRemove the key first, then Add() the new value

DClear the dictionary and add all entries again

Step-by-Step Solution

Solution:

Step 1: Understand updating values in Dictionary
Using the indexer with an existing key updates its value without error.
Step 2: Differentiate Add() and indexer
Add() throws if key exists; indexer overwrites safely.
Final Answer:
Use the indexer to assign the new value directly -> Option A
Quick Check:
Indexer updates value safely = A [OK]

Quick Trick: Indexer overwrites existing key values safely [OK]

Common Mistakes:

MISTAKES

Master "Collections" in C Sharp (C#)

9 interactive learning modes - each teaches the same concept differently

More C Sharp (C#) Quizzes

How can you update the value for an existing key in a Dictionary without causing an exception?