/// <summary>
/// Adds email addresses from another recipient list into this list.
/// </summary>
/// <remarks>
/// Only new email addresses will be added. Email addresses that exists
/// in this list already will not be affected.
/// </remarks>
/// <param name="sourceRecipientListId">The id of the recipient list where email addresses will be fetched from.</param>
/// <returns>The number of email addresses imported into this list</returns>
public int AddRecipientItemsFromRecipientList(int sourceRecipientListId)
{
RecipientData dataUtil = GetWorker();
int count = dataUtil.RecipientItemInsertFromRecipientList(_id, sourceRecipientListId);
ClearEmailAddressCount();
return(count);
}
