How to change the value in List<T> list2 without changing the value in List<T> list1 when using list1.AddRange(list2)?

55 Views Asked by Anh Đinh At 12 April 2025 at 16:58

My code

list1.AddRange(list2);
foreach (var item in list2)
{
    item.Value--;
}

when I change the value in list2, the values added to list1 before are also changed

how can the value in list1 not be changed?

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