/// <summary>
/// Universal RetrieveMultiple method override. Returns all pages using callback or 'yield' iterator
/// </summary>
/// <param name="query">A query that determines the set of record</param>
/// <param name="callback">Optional function to be called for each record page</param>
/// <returns>Entity set as 'yield' iterator</returns>
public static IEnumerable <Entity> RetrieveMultiple(this IOrganizationService service, QueryBase query, Action <EntityCollection> callback = null)
{
CheckParam.CheckForNull(query, nameof(query));
EntityCollection collection = new EntityCollection
{
MoreRecords = true
};
while (collection.MoreRecords)
{
/// Paging start working if Page > 1
query.NextPage(collection.PagingCookie);
collection = service.RetrieveMultiple(query);
callback?.Invoke(collection);
foreach (Entity entity in collection.Entities)
{
yield return(entity);
}
}
}