Implement a stack using queues.

public class Stack<T>
    {
        private Queue<T> _topOfStack;
        private Queue<T> _helperStack;

        public Stack()
        {
            _helperStack = new Queue<T>();
            _topOfStack = new Queue<T>();
        }

        public void Push(T data)
        {
            SwitchQueues(data);
        }

        public T Pop()
        {
            return _topOfStack.Dequeue();
        }

        public T Peek()
        {
            var data = _topOfStack.Dequeue();
            SwitchQueues(data);

            return data;
        }

        private void SwitchQueues(T data)
        {

            while (_topOfStack.Any())
            {
                _helperStack.Enqueue(_topOfStack.Dequeue());
            }

            _topOfStack.Enqueue(data);


            while (_helperStack.Any())
            {
                _topOfStack.Enqueue(_helperStack.Dequeue());
            }
        }
    }