list with only unique values c# code example

Example 1: unique items in list c#

var uniqueItemsList = yourList.Distinct().ToList();

Example 2: how to get unique list in c#

using(var dataModel = new DataModel())
{
  var classes = dataModel.Attributes.Where(a => a.Field == "Class").Select(a => a.Key).Distinct().ToList();
}