Get distinct list values

Question

i have a C# application in which i\'d like to get from a List of Project objects , another List which contains distinct objects.

i trie

Answer 1

var newList = 
(
from x in model
select new {Id_user= x.Id_user}
).Distinct();

or you can write like this

var list1 = model.DistinctBy(x=> x.Id_user);