Serialize data in class using for loop?

Hi, I was watching live training session video about load/save data and have a question. In the training video the author created a serializable class like this:

Code (CSharp):

1. [Serializable]
2.     class PlayerData
3.     {
4.         public int someparameter;
5.  
6.     }

Is it possible to use for loop inside the [serializable] class? When I tried I received error message:
"error CS1519: Unexpected symbol `for' in class, struct, or interface member declaration"
I would like to build a for loop which go through a list of unknown number of gameobjects in it, find one parameter in every gameobject on that list and save it. How can I do it?

 

Add an array or list of the desired data type to your class declaration and store the values in this array/list.

 

Ahh, yes! Thank you.