/// <summary>
 /// Deprecated Method for adding a new object to the Invoices EntitySet. Consider using the .Add method of the associated ObjectSet&lt;T&gt; property instead.
 /// </summary>
 public void AddToInvoices(Invoice invoice)
 {
     base.AddObject("Invoices", invoice);
 }
 /// <summary>
 /// Create a new Invoice object.
 /// </summary>
 /// <param name="id">Initial value of the id property.</param>
 /// <param name="payment_date">Initial value of the payment_date property.</param>
 /// <param name="customer_id">Initial value of the customer_id property.</param>
 /// <param name="from_inv_period">Initial value of the from_inv_period property.</param>
 /// <param name="to_inv_period">Initial value of the to_inv_period property.</param>
 /// <param name="total_due">Initial value of the total_due property.</param>
 /// <param name="amount_received">Initial value of the amount_received property.</param>
 public static Invoice CreateInvoice(global::System.Int32 id, global::System.DateTime payment_date, global::System.Int32 customer_id, global::System.DateTime from_inv_period, global::System.DateTime to_inv_period, global::System.Decimal total_due, global::System.Decimal amount_received)
 {
     Invoice invoice = new Invoice();
     invoice.id = id;
     invoice.payment_date = payment_date;
     invoice.customer_id = customer_id;
     invoice.from_inv_period = from_inv_period;
     invoice.to_inv_period = to_inv_period;
     invoice.total_due = total_due;
     invoice.amount_received = amount_received;
     return invoice;
 }