Remove instances from a list by using LINQ or Lambda?

Question

Now I come a stage to get all my data as a list in cache(objects) and my next thing I have to do is to remove some instances from the list.

Normally, I would do removing

Answer 1

If I get the question correctly, to produce a unique set from two List.

For this, you can use the following

List list1; List list2;

List list3 = list1.Except(list2)

The list3 will contain unique items.