Find all possible sub strings of a string

        static void Main(string[] args)

        {

            string value = Console.ReadLine();

            // Avoid full length.

            for (int length = 1; length < value.Length; length++)

            {

                // End index is tricky.

                for (int start = 0; start <= value.Length - length; start++)

                {

                    string substring = value.Substring(start, length);

                    Console.WriteLine(substring);

                }

            }

            Console.ReadLine();

        }