c# linq distinct list of objects code example

Example 1: how to use distinct in linq query in c#

var distValues = objList.Select(o=>o.typeId).Distinct().ToList();

Example 2: c# linq distinct group by nested list

var result = hotels.SelectMany(hotel => hotel.RoomType.Select(room => new { Id = room.RoomId, Hotel = hotel }))
                   .GroupBy(item => item.Id)
                   .Select(group => group.FirstOrDefault());