如何遍历对象列表，传递给方法然后将返回值存储在数组列表中？

I want to iterate through a List of Team objects, each object has a string and three integers within it. I want to pass it to a method which will compare the first Team object with the second one, then second to third and so on, Then finally get the returned enumerator depending on the comparison and store it into an array list.I want to iterate through a List of Team object