[Solved] What will be the output of this code snippet?using (var fs = new FileStream("data.txt", FileMode.Create)) using (var writer = new StreamWriter(fs)) { writer.WriteLine("Line1"); | C Sharp (C#)

C Sharp (C#) - File IO

What will be the output of this code snippet?

using (var fs = new FileStream("data.txt", FileMode.Create))
using (var writer = new StreamWriter(fs))
{
    writer.WriteLine("Line1");
}
Console.WriteLine(File.ReadAllText("data.txt"));

AEmpty output

BLine1

CFileNotFoundException

DCompilation error

Step-by-Step Solution

Solution:

Step 1: Nested using statements open and write to file
FileStream is created, StreamWriter writes "Line1" to it.
Step 2: Both streams are disposed properly
Disposing StreamWriter flushes data, disposing FileStream closes file.
Final Answer:
Line1 -> Option B
Quick Check:
Nested using ensures file content is written [OK]

Quick Trick: Nested using disposes inner writer before outer stream [OK]

Common Mistakes:

MISTAKES

Assuming file is empty due to missing flush
Expecting exceptions from nested using
Confusing FileMode.Create with FileMode.Open

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What will be the output of this code snippet?

Step 1: Nested using statements open and write to file

Step 2: Both streams are disposed properly

Final Answer:

Quick Check:

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