public interface IStack
        {
            char peek();
            char pop();
            void push(char nytt);
            bool isEmpty();
        }

        public class Stack<t> : IStack
        {
            LinkedList<char> minStack = new LinkedList<char>();

            public char peek()
            {
                return minStack.Last.Value;
            }


            public char pop()
            {
                minStack.RemoveLast();

                return minStack.Last.Value;




            }



            public void push(char nytt)
            {
                minStack.AddLast(nytt);
            }

            public bool isEmpty()
            {

                if (minStack.Count == 0)
                {
                    return true;

                }
                else
                {
                    return false;

                }

            }


            }

            // something something här (resten av funktionerna)


            static void Main(string[] args)
            {
                Stack<char> stacken = new Stack<char>();

                try
                {
                    //stacken.pop();
                    stacken.push('s'); stacken.push('r');
                    stacken.push('a'); stacken.push('w');
                    stacken.push(' ');
                    stacken.push('r'); stacken.push('a');
                    stacken.push('t'); stacken.push('s');
                }

                catch (InvalidOperationException e)
                {

                    Console.WriteLine(e.Message);
                }



                while (!stacken.isEmpty())
                {
                    Console.Write(stacken.pop());
                }

                Console.ReadLine();