Not getting the distinct data from list

Hi everyone,
I am trying to get the distinct data from one list to another but it is not working .. my code is something like that:---
 var orderdetails = new List<StaticOrders>             {                 new StaticOrders() {id=1,ordername="a",ordertype="shoe",orderdate=DateTime.Now.ToShortDateString()},                 new StaticOrders() {id=2, ordername="b", ordertype="shirt",orderdate=DateTime.Now.ToShortDateString()},                 new StaticOrders() {id=2,ordername="a",ordertype="shoe",orderdate=DateTime.Now.ToShortDateString()},          &nb ...