add atrributes as an array in mscrm 2011 when creating new record

Dear all;

as we know that when we create new record throguh plugin we add field names and value for example 

Entity account= new Entity();

account["name"]="abc"

service.create(account);

can we do in a way like 

we have array of fields

Account[1]="abc"

service.create(Account);