in C#

class Solution
{

    public Stack<char> charS = new Stack<char>();
    public Queue<char> charQ = new Queue<char>();

    void pushCharacter(char c)
    {
        charS.Push(c);
    }

    char popCharacter()
    {
        return charS.Pop();
    }
    void enqueueCharacter(char c)
    {
        charQ.Enqueue(c);
    }

    char dequeueCharacter()
    {
       return charQ.Dequeue();
    }