How to find directory in computer

static void Main(string[] args)
{
   DirectoryInfo selectedDir;

   // Find a directory called "Exported" on any available logical drive.
   // If you need to find the directory on a spicific logical drive, provide the DriveInfo for the drive to search.
   selectedDir = FindDirectory("Exported");
   if (selectedDir == null)
   {
      Console.WriteLine("No directory was found matching the provided name.");
   }
   else
   {
      Console.WriteLine("The folloiwng directory path was selected:");
      Console.WriteLine(selectedDir.FullName);
   }
            
   Console.ReadLine();
}

static DirectoryInfo FindDirectory(string dirNameToFind, DriveInfo driveToSearch = null)
{
   // Prevent null strings or searching for invalid directory names (contains invalid charaters).
   if ((String.IsNullOrEmpty(dirNameToFind)) || (!IsValidDirectoryName(dirNameToFind))) { return null; }

   List<directoryinfo> possibleDirs = new List<directoryinfo>();

   if (driveToSearch == null)
   {
      // No drive was specified, so search all drives.
      foreach (DriveInfo availableDrive in DriveInfo.GetDrives())
      {
         // Only check non-network drives and drives with removable media that are ready (disk installed).
         if ((availableDrive.DriveType != DriveType.Network) && (availableDrive.IsReady))
         {
            DirectoryInfo driveRootDir = new DirectoryInfo(availableDrive.Name);
            GetDirectories(possibleDirs, driveRootDir, dirNameToFind);
         }
      }
   }
   else
   {
      // A drive was provided, so only search that drive.
      DirectoryInfo driveRootDir = new DirectoryInfo(driveToSearch.Name);
      GetDirectories(possibleDirs, driveRootDir, dirNameToFind);
   }
            
   if (possibleDirs.Count() == 0) { return null; }  // No dir matches, so return null.
   if (possibleDirs.Count() ==1) { return possibleDirs[0]; } // Only one dir matched, so return that dir.


   // More than one directory exsits matching the provided name. So ask the user to which directory they want.
   Console.WriteLine("Multiple directories were found matching the provided name.");
   Console.WriteLine("Please indicate which directory to use.");
   Console.WriteLine();

   for (int i = 1; i <= possibleDirs.Count(); i++) { Console.WriteLine(i.ToString() + ": " + possibleDirs[i - 1].FullName); }

   Console.WriteLine();

   bool vaidInput = false;
   int selectedItemNo = -1;
   do
   {
      Console.WriteLine("Enter corrisponding number and press enter.");
      string userInput = Console.ReadLine();

      if (String.IsNullOrEmpty(userInput)) { continue; }  // Handle blank entries.

      vaidInput = int.TryParse(userInput, out selectedItemNo);
   }
   while ((!vaidInput) && (Enumerable.Range(1, possibleDirs.Count()).Contains(selectedItemNo)));

   return possibleDirs[selectedItemNo - 1];
}

static bool IsValidDirectoryName(string directoryName)
{
   foreach (char c in Path.GetInvalidPathChars())
   {
      if (directoryName.Contains(c)) { return false; }
   }
   return true;
}

static void GetDirectories(List<directoryinfo> dirList, DirectoryInfo rootDir, string dirNameToFind = null)
{
   // Perform manual recurrsion to prevent "UnauthorizedAccessException" errors.
   try
   {
      foreach (DirectoryInfo subDir in rootDir.GetDirectories("*", SearchOption.TopDirectoryOnly))
      {
         if ((String.IsNullOrEmpty(dirNameToFind)) || (subDir.Name == dirNameToFind)) { dirList.Add(subDir); }
         GetDirectories(dirList, subDir, dirNameToFind);
      }
   }
   catch (UnauthorizedAccessException) {  }    // Do nothing.
}