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johnkainn asked on

Copy List

I would like to create a seperate copy of a list, so that when the first list is cleared the items in the second list are not cleared. How is best to do this?
List<SearchItem> secondList = new List<SearchItem>();
secondList = searchItemList;
searchItemList.Clear();
//second list should not be cleared as well.

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.NET Programming

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johnkainn

8/22/2022 - Mon
Bruce_1975

Your code will not work ;o)

secondList = searchItemList;
creates a reference of searchItemList. This means that both,  secondList  and searchItemList use the same memory space and the Clear() method will clear this memory. You have to create a new instance. One possible solution:
List<SearchItem> secondList = new List<SearchItem> searchItemList.ToArray());
searchItemList.Clear();

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Bruce_1975

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johnkainn

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