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You want to build a large text by adding many small strings in a loop. Which approach is best in C#?

hard🚀 Application Q8 of Q15
C Sharp (C#) - Strings and StringBuilder
You want to build a large text by adding many small strings in a loop. Which approach is best in C#?
AUse string concatenation with + inside the loop
BUse StringBuilder to append strings inside the loop
CUse char arrays and convert to string after loop
DUse Console.WriteLine inside the loop to build string
Step-by-Step Solution
Solution:

  1. Step 1: Understand performance of string concatenation in loops

    Concatenating strings repeatedly creates many temporary strings, slowing performance.

  2. Step 2: Use StringBuilder for efficient appending

    StringBuilder modifies a buffer internally, avoiding many temporary objects.

  3. Final Answer:

    Use StringBuilder to append strings inside the loop -> Option B

  4. Quick Check:

    StringBuilder is best for many string additions [OK]
Quick Trick: For many string adds, prefer StringBuilder over + operator [OK]
Common Mistakes:
MISTAKES
  • Using + operator in loops causing slow code
  • Trying to build string with Console.WriteLine
  • Ignoring StringBuilder benefits

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