Why does the using statement guarantee that the file stream is closed even if an exception occurs inside its block?

hard🧠 Conceptual Q10 of 15

C Sharp (C#) - File IO

Why does the using statement guarantee that the file stream is closed even if an exception occurs inside its block?

ABecause it generates a try-finally block that calls Dispose automatically.

BBecause it prevents exceptions from being thrown inside the block.

CBecause it locks the file exclusively during the block.

DBecause it duplicates the stream to avoid closing the original.

Step-by-Step Solution

Solution:

Step 1: Understand how using is implemented
The using statement compiles into a try-finally structure.
Step 2: Role of finally block
The finally block calls Dispose on the object even if exceptions occur.
Final Answer:
Because it generates a try-finally block that calls Dispose automatically. -> Option A
Quick Check:
using = try-finally + Dispose call [OK]

Quick Trick: Using compiles to try-finally calling Dispose [OK]

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