How can you list all files in a directory, including subdirectories?

Question

ICSM Computer · Answer

To list all files in a directory, including its subdirectories, you can use the
Directory.GetFiles method with the SearchOption.AllDirectories option in C#.
Example: Get all files recursively
using System;
using System.IO;
class Program
{
    static void Main()
    {
        string rootPath = @"C:\MyFolder";
        try
        {
            string[] allFiles = Directory.GetFiles(rootPath, "*.*", SearchOption.AllDirectories);
            foreach (string file in allFiles)
            {
                Console.WriteLine(file);
            }
        }
        catch (UnauthorizedAccessException ex)
        {
            Console.WriteLine("Access denied: " + ex.Message);
        }
        catch (DirectoryNotFoundException ex)
        {
            Console.WriteLine("Directory not found: " + ex.Message);
        }
    }
}
Parameters:
*.* – Matches all files.SearchOption.AllDirectories – Tells the method to search recursively.You can filter by extension too, e.g., "*.txt".
Notes:
Wrap in a try-catch block to handle access issues.Be cautious with very large directory trees—it can be slow or memory-intensive.
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How can you list all files in a directory, including subdirectories?

ICSM Computer

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1 Answers

Example: Get all files recursively

Parameters:

Notes:

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