Find and Replace text in all files of a given folder , including subfolders with C#

If you want to find and replace some text in all files of a given folder, including subfolders, you can use the following C# code:

string rootfolder = @"C:\Temp";
   string[] files = Directory.GetFiles(rootfolder, "*.*", SearchOption.AllDirectories);
   foreach (string file in files)
   {    try
     {    string contents = File.ReadAllText(file);
       contents = contents.Replace(@"Text to find", @"Replacement text");        // Make files writable
       File.SetAttributes(file, FileAttributes.Normal); 

       File.WriteAllText(file, contents);
     }
     catch (Exception ex)
     {    Console.WriteLine(ex.Message);
     }
   }