var dirFolder = @"c:\";
var folders = new DirectoryInfo(dirFolder).GetDirectories();
Random rnd = new Random();
Console.WriteLine(folders[rnd.Next(folders.Length)].Name);
var dirFolder = @"c:\";
var folders = new DirectoryInfo(dirFolder).GetDirectories();
Random rnd = new Random();
Console.WriteLine(folders[rnd.Next(folders.Length)].Name);