Better Search for a string in all files using C#

After referring many blogs and articles, I have reached at the following code for searching for a string in all files inside a folder. It is working fine in my tests. QUESTIONS - Is there a faster approach for this (using C#)? - Is there any scenario that will fail with this code? Note: I tested with very small files. Also very few number of files. CODE ``` static void Main() { string sourceFolder = @"C:\Test"; string searchWord = ".class1"; List<string> allFiles = new List<string>(); AddFileNamesToList(sourceFolder, allFiles); foreach (string fileName in allFiles) { string contents = File.ReadAllText(fileName); if (contents.Contains(searchWord)) { Console.WriteLine(fileName); } } Console.WriteLine(" "); System.Console.ReadKey(); } public static void AddFileNamesToList(string sourceDir, List<string> allFiles) { string[] fileEntries = Directory.GetFiles(sourceDir); foreach (string fileName in fileEntries) { allFiles.Add(fileName); } //Recursion string[] subdirectoryEntries = Directory.GetDirectories(sourceDir); foreach (string item in subdirectoryEntries) { // Avoid "reparse points" if ((File.GetAttributes(item) & FileAttributes.ReparsePoint) != FileAttributes.ReparsePoint) { AddFileNamesToList(item, allFiles); } } } ``` REFERENCE - Using StreamReader to check if a file contains a string - Splitting a String with two criteria - C# detect folder junctions in a path - Detect Symbolic Links, Junction Points, Mount Points and Hard Links - FolderBrowserDialog SelectedPath with reparse points - C# - High Quality Byte Array Conversion of Images