How to update a specific element from List<T> element collections?

Question

I have a list of custom objects List and I would like to update a specific element say 3rd element from top, How would I do that in C#?

Answer 1

Use List<T>.Item property.

Answer 2

// Updates a property or member of the item
myList[2].myProperty = something;

// Replaces the item in the list
myList[2] = someNewItem;