Search Files by Name in Folder and Subfolders in C#

using System;  // For general system functions
using System.IO;  // For file and directory handling
using System.Linq;  // For LINQ to handle search operations

class Program
{
    static void Main()
    {
        // Ask the user to enter the folder path
        Console.Write("Enter the path of the folder: ");
        string folderPath = Console.ReadLine();

        // Validate the folder path
        if (!Directory.Exists(folderPath))
        {
            Console.WriteLine("The specified folder does not exist.");
            return;
        }

        // Get all files in the specified folder and its subfolders
        var files = GetFilesFromDirectory(folderPath);

        // Repeat the search process until the user enters an empty string
        while (true)
        {
            // Ask the user for the search term
            Console.Write("Enter text to search in file names (or press Enter to exit): ");
            string searchText = Console.ReadLine();

            // If the search text is empty, exit the program
            if (string.IsNullOrEmpty(searchText))
            {
                Console.WriteLine("Exiting program.");
                break;
            }

            // Find and display files that contain the search text in their name
            var matchingFiles = files.Where(file => file.IndexOf(searchText, StringComparison.OrdinalIgnoreCase) >= 0).ToList();

            if (matchingFiles.Any())
            {
                Console.WriteLine("Matching files:");
                foreach (var file in matchingFiles)
                {
                    Console.WriteLine(file);  // Display the file names
                }
            }
            else
            {
                Console.WriteLine("No files found with that search text.");
            }
        }
    }

    // Method to retrieve all files from the directory and its subdirectories
    static string[] GetFilesFromDirectory(string directoryPath)
    {
        // Get all files in the directory and its subdirectories recursively
        string[] files = Directory.GetFiles(directoryPath, "*", SearchOption.AllDirectories);

        return files;  // Return the list of files
    }
}

 Output

Enter the path of the folder: C:\Users\Example\Documents

Enter text to search in file names (or press Enter to exit): report
Matching files:
C:\Users\Example\Documents\Report_2023.txt
C:\Users\Example\Documents\AnnualReport_2023.txt

Enter text to search in file names (or press Enter to exit): summary
Matching files:
C:\Users\Example\Documents\Summary_2023.txt

Enter text to search in file names (or press Enter to exit): 

Exiting program.