string[] files = Directory.GetFiles("C:\\");

            // Array
            string[] info = new string[files.Length];
            int i = 0;
            foreach (string filepath in files)
            {
                FileInfo inf = new FileInfo(filepath);
                info[i] = inf.Name;
                i++;
            }

            // List
            List<string> info2 = new List<string>();
            foreach (string filepath in files)
            {
                FileInfo inf = new FileInfo(filepath);
                info2.Add(inf.Name);
            }