/// <summary>
 /// InvoiceXpress <a href="https://invoicexpress.com/api/simplified-invoices/update">SimplifiedInvoices Update</a> Method
 /// </summary>
 public static void Update(string apiKey, string accountName, int simplifiedInvoiceId, SimplifiedInvoiceDto inputData)
 {
     Rest_Update(apiKey, accountName, simplifiedInvoiceId, inputData.XmlSerializeToString());
 }
            /// <summary>
            /// InvoiceXpress <a href="https://invoicexpress.com/api/simplified-invoices/create">SimplifiedInvoices Create</a> Method
            /// </summary>
            public static SimplifiedInvoiceDto Create(string apiKey, string accountName, SimplifiedInvoiceDto inputData)
            {
                HttpResponseInfo result = Rest_Create(apiKey, accountName, inputData.XmlSerializeToString());

                return(result.Text.DeserializeXml <SimplifiedInvoiceDto>());
            }