c# - How to eliminate duplicates from a list? -

class infocontact {         private string contacts_first_namefield;      private string contacts_middle_namefield;      private string contacts_last_namefield;              private phonenumber[] phone_numbersfield;      private emailaddress[] emailfield; } 

i have list<infocontact> list contains 7000 other program. in list out of 7000, 6500 duplicates. looking way how eliminate duplicates.

a infocontact duplicate if first_name, last_name, emailaddresses, phone numbers same.

i thought of using hashset<infocontact> , override gethashcode() of infocontact.

i curious know if best way do. if not way better way?

firstly think of extracting unique values. use distinct() linq method comparer like:

public class infocontactcomparer : iequalitycomparer<infocontact> {     public bool equals(infocontact x, infocontact y)     {         return x.contacts_first_namefield == y.contacts_first_namefield             && x.contacts_last_namefield == y.contacts_last_namefield             && ...     }      public int gethashcode(infocontact obj)     {         return obj.contacts_first_namefield.gethashcode();     } }