The following fragment of C# includes the declarations of some properties:public class Customer{ private int numberOfOrders = 0; public int ID{ get{return numberOfOrders;} set{numberOfOrders = value;} } } Suppose that a variable customer of class Customer has been declared, instantiated and initialised. Write statement(s) in C#, using the properties, that will increase the customer’s number of orders by 1.

The provided code declares a property `ID` which actually gets and sets the `numberOfOrders` field. To increase the number of orders by 1, you should modify the `numberOfOrders` field directly. Here is the C# statement to increment the `numberOfOrders` field by 1:

customer.ID += 1;

This code will call the `set` accessor of the `ID` property and pass the incremented value of `numberOfOrders` to it, which will update the `numberOfOrders` field accordingly.