how to purchase item from dealer in inventory management system

Here i am going to show you that how to purchase item from dealer in inventory management system, I creare one more table name purchase_master and on that table we are going save product_info which we buy from dealer and moreover you can use this system in multiple environment like how to developed Stock management system in c#,how to developed Sales And Inventory System C#, C# tutorial for build inventory management system, how to developed supermarket management software, how to developed medical store management system