private static void Main(string[] args) { Product product1 = new Product(); //101 product1.Id = 1; product1.CategoryId = 2; product1.ProductName = "Masa"; product1.UnitPrice = 500; product1.UnitsInStock = 3; Product product2 = new Product { Id = 2, CategoryId = 5, UnitsInStock = 5, ProductName = "Kalem", UnitPrice = 35 }; //PascalCase //camelCase //case sensitive ProductManager productManager = new ProductManager(); productManager.Add(product1); Console.WriteLine(product1.ProductName); int numb = 100; productManager.DoThings(numb); Console.WriteLine(numb); //100 productManager.Add2(product2); Console.WriteLine(product2.ProductName); //NewName //int,double,bool... value type //diziler,class, abstract class, interface ... reference type //ref out }