Compare the difference between two list

Question

I\'am trying to check the difference between two List in c#.

Example:

List FirstList = new List         


        

Answer 1

Than for this king of reuqirement you can can make use of Except function.

List newlist =  List1.Except(List2).ToList();

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or you can do this , so the below one create new list three which contains items that are not common in list1 and list2

var common = List1.Intersect(List2);

var list3 = List1.Except(common ).ToList();
list3.AddRange(List2.Except(common ).ToList());

the above one is help full when list1 and list2 has differenct item like

List list1= new List();
List list2 = new List();

The FirstList is filled with the following values:

list1.Add("COM1");
list1.Add("COM2");
list1.Add("COM4");

The SecondList is filled with the following values:

list2 .Add("COM1");
list2 .Add("COM2");
list2 .Add("COM3");

by using above code list3 contains COM4 and COM3.