How to add to end of array C#?

Question

How do I add a new item from a TextBox and Button on a Windows Form at the end of an ArrayList which references a class?

private product[] value = new product[4];

value[1] = new product("One",5)
value[2] = new product("Two",3)
value[3] = new product("Three",8)

Workflow

• Enter new products details into textbox1, textbox2, textbox3

• When I click Add the new product gets added to the array:

  value[1] = new product("One",5)
value[2] = new product("Two",3)
value[3] = new product("Three",8)
value[4] = new product("Four",2)

What is the code for doing this?

Answer 1

Arrays are fixed size, which means you can't add more elements than the number allocated at creation time, if you need a auto sizing collection you could use List<T> or an ArrayList

Example:

// using collection initializers to add two products at creation time
List<Product> products = new List<Product>{new Product("One",5), new Product("Two",3) };

// then add more elements as needed
products.Add(new Product("Three",8));