Question

Is there a easy way to find duplicates in list, and then sort them by number of appearance? Also, duplicates should be removed.

Eg. you have a List<String> like this:

List<String> = new List<String>{"6","1","2","2","4","6","5","1","6","6","2"};

Question is, how to convert this list into -> “6”, “1”, “2”, “4”, “5”?

Answer 1

use Linq.Distinct()

List<String> list = new List<String>{"6","1","2","2","4","6","5","1","6","6","2"};
list = list.Distinct().ToList();