Manually merging a list in C # with duplicates

Question

I am trying to figure out how to handle combining or combining two lists that may have duplicates. For example, List1 has {A, B, C} and List2 has {B, C, D}. I tried using the Union operation and got a new list with values ​​(A, B, C, D). However, I need the values ​​of B and C from the second list, not the first. Is there a way to specify a union method that duplicates the value to use.

The code I'm using now is

var newList = List1.Union<Object>(List2).ToList();

Thanks for any help. Javid

Answer 1

A connection is logically a dialing operation. Concat is what you are looking for.

List1.Concat(List2)

Answer 2

:

var newList = List2.Union<Object>(List1).ToList(); 

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Answer 3

You tried

var newList = List2.Union<Object>(List1).ToList();

Answer 4

You can look Joining your listings. After this operation, you will have "join" objects for each duplicate to check ...