[Solved] Identify the error in this code snippet using StringBuilder:StringBuilder sb; sb.Append("Hello"); Console.WriteLine(sb.ToString()); | C Sharp (C#)

C Sharp (C#) - Strings and StringBuilder

Identify the error in this code snippet using StringBuilder:

StringBuilder sb;
sb.Append("Hello");
Console.WriteLine(sb.ToString());

AStringBuilder is not initialized before use

BAppend method does not exist

CToString() cannot be called on StringBuilder

DConsole.WriteLine syntax is incorrect

Step-by-Step Solution

Solution:

Step 1: Check variable initialization
StringBuilder sb is declared but not assigned an instance with 'new'.
Step 2: Understand consequences
Calling Append on uninitialized sb causes runtime error (NullReferenceException).
Final Answer:
StringBuilder is not initialized before use -> Option A
Quick Check:
Uninitialized objects cause errors = B [OK]

Quick Trick: Always initialize StringBuilder with 'new' before use [OK]

Common Mistakes:

MISTAKES

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