X++ is a high level object oriented language with robust data access features. It is often used to create management systems pertaining to businesses, their accounts and finances, and many other business processes. You may be wondering why you need X++ for Microsoft Dynamics when a powerful language C# is already present. This is because X++ is more appropriate for ERP systems and business management systems and is tailor-made for such. It can also combine processing code and SQL easily, which comes as an advantage in making such systems.