[Solved] Identify the error in this code:var sb = new StringBuilder(); sb.Append("Test"); sb = sb + "ing"; Console.WriteLine(sb.ToString()); | C Sharp (C#)

C Sharp (C#) - Strings and StringBuilder

Identify the error in this code:

var sb = new StringBuilder();
sb.Append("Test");
sb = sb + "ing";
Console.WriteLine(sb.ToString());

ACannot use '+' operator with StringBuilder and string

BMissing semicolon after Append

CStringBuilder cannot be declared with var

DToString method is missing parentheses

Step-by-Step Solution

Solution:

Step 1: Check usage of '+' operator with StringBuilder
StringBuilder does not support '+' operator with strings directly.
Step 2: Identify correct way to append strings
Use Append method instead of '+' operator to add strings.
Final Answer:
Cannot use '+' operator with StringBuilder and string -> Option A
Quick Check:
StringBuilder '+' operator invalid = Cannot use '+' operator with StringBuilder and string [OK]

Quick Trick: Use Append, not '+' to add strings to StringBuilder [OK]

Common Mistakes:

MISTAKES

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