//压栈
stack.push(1);
stack.push("string");
stack.push(true);
stack.push(1.2f);

object o = stack.Pop();

object o = stack.Peek();

bool isInStack = stack.Contains("string");

stack.Clear();

int stackCount = stack.Count();

object[] stackArray = stack.ToArray();

for(int i = 0;i < stackArray.Length;i++)
{
    Debug.Log(stackArray[i]);
}

while(stack.Count > 0)
{
    object o = stack.Pop();
    Debug.Log(o);
}