How to select distinct case sensitive record using linq inc#

Here is my code

 

 

var db = (from customer in entity.CUSTOMER_MASTER
select new { customer.CUSTOMER_NM, customer.CUSTOMER_CODE }).Distinct().OrderBy(customer => customer.CUSTOMER_NM).ToList();

 

Now,Please suggest me,how to do the same using linq,to fetch distinct case senstive record in c# using entity framework