private bool Equals(IInvoiceLineItem other)
{
return(Product == other.Product && Description == other.Description && Quantity.Equals(other.Quantity) && Rate.Equals(other.Rate) && TaxPercentage.Equals(other.TaxPercentage) &&
DiscountPercentage.Equals(other.DiscountPercentage) && Total.Equals(other.Total) && Subtotal.Equals(other.Subtotal) && Tax.Equals(other.Tax) && LineIdx == other.LineIdx);
}