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How can you combine StringBuilder with LINQ to create a comma-separated string from a list of words?

hard🚀 Application Q9 of Q15
C Sharp (C#) - Strings and StringBuilder
How can you combine StringBuilder with LINQ to create a comma-separated string from a list of words?
AUse StringBuilder's Replace method to add commas
BUse StringBuilder and loop through words appending with commas
CUse LINQ's Select to convert words to uppercase only
DUse LINQ's Where to filter words and ignore StringBuilder
Step-by-Step Solution
Solution:

  1. Step 1: Understand LINQ and StringBuilder roles

    LINQ can transform collections; StringBuilder efficiently builds strings.

  2. Step 2: Combine by looping LINQ results and appending with commas

    Use StringBuilder to append each word with a comma separator in a loop.

  3. Final Answer:

    Use StringBuilder and loop through words appending with commas -> Option B

  4. Quick Check:

    Combine LINQ + StringBuilder by looping and appending [OK]
Quick Trick: Loop LINQ results, append with StringBuilder [OK]
Common Mistakes:
MISTAKES
  • Using Replace to add commas incorrectly
  • Ignoring StringBuilder when building strings
  • Using Where without building string

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