How can you use CsvHelper Map to bind two objects dynamically?

for CsvHelper i have used Map function for simple use for object

 MemberInfo dMember = new Contact().GetType().GetProperty("FirstName"));
 Map(typeof(Contact), dMember).Name("fname"); //works simple conversion

Here FirstName and fname both comes from configuration which is in Json file \

Now next object which is a List of another class i cannot do.Name i need use .ConvertUsing and do some merging of fields from CSV file i will have 3 fields Email1,Email2,Email3 which has to map to List where Email is a class and has property of an email address.

I was successful to find a way to use dynamic lambda function because Map(x=>x.Email) has to be custom and it should be able to do conversion for any object

    string field = "EmailAddresses"; //field name of a class
    string exp = $"c.{field}";
    var p = Expression.Parameter(typeof(Contact), "c");
    var e = DynamicExpressionParser.ParseLambda(new[] { p }, null, exp);

   // now here e.ReturnType is List<Email> but i cannot use List<Email> instead of dynamic because this 
    //function will also be called for other types so it has resolve at runtime. This maping fails with cannot convert Type Email to Type Object
 Map((Expression<Func<Contact, List<dynamic>>>)e).ConvertUsing(row =>
    {
        dynamic list = new List<ExpandoObject>();
        dynamic email = new ExpandoObject();
        var emailAddress = row.GetField("email_address");
        email.EmailAddress = (emailAddress != null) ? emailAddress:"abc@g.com";
        list.Add(email);
        return list;
    }