제네릭

using System;

class Stack<StackType>
{
    private StackType[] stack = new StackType[100];

    private int sp = -1;

    public void Push(StackType element)
    {
        stack[++sp] = element;
    }

    public StackType Pop()
    {
        return stack[sp--];
    }
}

class GenericClassApp
{
    public static void Main()
    {
        Stack<int> stk1 = new Stack<int>();        // 정수형 스택
        Stack<double> stk2 = new Stack<double>();  // 실수형 스택

        ..
    }
}