Read key by key and whole strings in Console

console.cs

static void Main(string[] args)
        {
            bool run = true;
            var sb = new StringBuilder();
            do
            {
                var key = Console.ReadKey();
                
                if (key.Key == ConsoleKey.UpArrow) run = false;
                else if(key.Key == ConsoleKey.Backspace)
                {
                    Console.Write('\0');
                    Console.CursorLeft = Console.CursorLeft > 0 ? Console.CursorLeft - 1 : 0;
                    if (sb.Length > 0) sb.Remove(sb.Length - 1, 1);
                }
                else if (key.Key == ConsoleKey.Enter) run = false;
                else sb.Append(key.KeyChar);
            } while (run);
            Console.WriteLine("finished - {0}", sb);
            Console.ReadLine();
        }