You want to list all files with ".txt" extension in a directory and its subdirectories. Which code snippet correctly does this?

hard🚀 Application Q8 of 15

C Sharp (C#) - File IO

Astring[] files = Directory.EnumerateFiles(path, "*.txt", SearchOption.TopDirectoryOnly);

Bstring[] files = Directory.GetFiles(path, "*.txt");

Cstring[] files = Directory.GetFiles(path, "*.txt", SearchOption.AllDirectories);

Dstring[] files = Directory.EnumerateFiles(path, "*.txt", SearchOption.None);

Step-by-Step Solution

Solution:

Step 1: Understand Directory.GetFiles parameters
GetFiles with SearchOption.AllDirectories searches recursively in all subdirectories.
Step 2: Compare options
string[] files = Directory.GetFiles(path, "*.txt", SearchOption.AllDirectories); uses correct method and SearchOption to include subdirectories; others miss recursion or use wrong SearchOption.
Final Answer:
string[] files = Directory.GetFiles(path, "*.txt", SearchOption.AllDirectories); -> Option C
Quick Check:
Use SearchOption.AllDirectories for recursive file search [OK]

Quick Trick: Use SearchOption.AllDirectories to include subfolders [OK]

Common Mistakes:

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