C Sharp (C#) - Strings and StringBuilder
How can you safely check if a string variable is null or empty before using it in C#?
How can you safely check if a string variable is null or empty before using it in C#?
hard🚀 Application Q9 of Q15
Step-by-Step Solution
Solution:
Step 1: Identify safe null or empty check
string.IsNullOrEmpty returns true if string is null or empty.Step 2: Understand why other options fail
Comparing to "null" text or only empty string misses null; length check is unrelated.Final Answer:
Use string.IsNullOrEmpty method -> Option BQuick Check:
Use string.IsNullOrEmpty to check null or empty safely [OK]
Quick Trick: Use string.IsNullOrEmpty to avoid null or empty errors [OK]
Common Mistakes:
MISTAKES- Comparing string to "null" text instead of null value
- Checking length without null check
- Using == with empty string only
Master "Strings and StringBuilder" in C Sharp (C#)
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