/// <summary>
 /// Lists the available invoices for a subscription in reverse chronological
 /// order beginning with the most recent invoice. In preview, invoices are
 /// available via this API only for invoice periods which end December 1, 2016
 /// or later.  This is only supported for Azure Web-Direct subscriptions. Other
 /// subscription types which were not purchased directly through the Azure web
 /// portal are not supported through this preview API.
 /// <see href="https://go.microsoft.com/fwlink/?linkid=842057" />
 /// </summary>
 /// <param name='operations'>
 /// The operations group for this extension method.
 /// </param>
 /// <param name='expand'>
 /// May be used to expand the downloadUrl property within a list of invoices.
 /// This enables download links to be generated for multiple invoices at once.
 /// By default, downloadURLs are not included when listing invoices.
 /// </param>
 /// <param name='filter'>
 /// May be used to filter invoices by invoicePeriodEndDate. The filter supports
 /// 'eq', 'lt', 'gt', 'le', 'ge', and 'and'. It does not currently support
 /// 'ne', 'or', or 'not'.
 /// </param>
 /// <param name='skiptoken'>
 /// Skiptoken is only used if a previous operation returned a partial result.
 /// If a previous response contains a nextLink element, the value of the
 /// nextLink element will include a skiptoken parameter that specifies a
 /// starting point to use for subsequent calls.
 /// </param>
 /// <param name='top'>
 /// May be used to limit the number of results to the most recent N invoices.
 /// </param>
 public static IPage <Invoice> List(this IInvoicesOperations operations, string expand = default(string), string filter = default(string), string skiptoken = default(string), int?top = default(int?))
 {
     return(operations.ListAsync(expand, filter, skiptoken, top).GetAwaiter().GetResult());
 }