C Sharp (C#) - Exception Handling
Which of the following correctly demonstrates the use of a
using statement to manage a disposable resource in C#?Which of the following correctly demonstrates the use of a using statement to manage a disposable resource in C#?
easy📝 Syntax Q3 of 15
Step-by-Step Solution
Solution:
Step 1: Identify correct syntax
The classicusingstatement requires parentheses around the resource declaration and a block of code.Step 2: Analyze options
using (var resource = new Resource()) { resource.DoWork(); } uses the correct syntax:using (var resource = new Resource()) { ... }. using var resource = new Resource(); resource.DoWork(); is valid syntax in C# 8.0 and later, so it is also correct. using Resource resource = new Resource(); resource.DoWork(); omits parentheses and uses incorrect syntax. using (Resource resource = new Resource()) resource.DoWork(); lacks braces which is allowed only if the statement is a single line, but the resource declaration must be inside parentheses.Final Answer:
using (var resource = new Resource()) { resource.DoWork(); } -> Option BQuick Check:
Classicusingrequires parentheses and braces [OK]
Quick Trick: Classic using needs parentheses and braces [OK]
Common Mistakes:
MISTAKES- Omitting parentheses in using statement
- Not enclosing code block in braces
- Using incorrect variable declaration syntax
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