How do you list only files with a specific extension (e.g., .txt) in a directory?

Question

ICSM Computer · Answer

To list only files with a specific extension (e.g., .txt) in a directory in C#, you can use the
Directory.GetFiles method with a search pattern.
Example: Get .txt files from a folder
using System;
using System.IO;
class Program
{
    static void Main()
    {
        string folderPath = @"C:\MyFolder";
        try
        {
            string[] txtFiles = Directory.GetFiles(folderPath, "*.txt");
            foreach (string file in txtFiles)
            {
                Console.WriteLine(file);
            }
        }
        catch (Exception ex)
        {
            Console.WriteLine("Error: " + ex.Message);
        }
    }
}
To include subdirectories too:
Use the SearchOption.AllDirectories flag:
string[] txtFiles = Directory.GetFiles(folderPath, "*.txt", SearchOption.AllDirectories);
Notes:
Search pattern like "*.txt" can be "*.csv", "data*.json", etc.It returns full file paths.You can also filter manually using Directory.EnumerateFiles() with
LINQ for more complex logic.

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How do you list only files with a specific extension (e.g., .txt) in a directory?

ICSM Computer

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1 Answers

Example: Get `.txt` files from a folder

To include subdirectories too:

Notes:

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