How to prevent duplicate values in enum?

Question

I wonder is there a way to prevent an enum with duplicate keys to compile?

For instance this enum below will compile

public         


        

Answer 1

another solution to have unique values based on selected columns

var uniqueData = temp.Select(u => new tblschClassSchedule
            {
                TeacherName = u.TeacherName,
                SubjectName = u.SubjectName,

            }).Distinct() ;

this will get only 2 columns and only unique data for those columns