Chapter 3

A1:	A sealed class cannot be inherited. A sealed class is used primarily when the class contains static members. Note that a struct is implicitly sealed.
A2:	A class can inherit from one class explicitly and inherits from System.Object implicitly. It can inherit from any number of interfaces.
A3:	ShowName is static and cannot be referenced from a class instance. ShowName.ShowMe("My Name is Ishmael");
A4:	An abstract class may contain both abstract and non-abstract methods.
A5:	new is used to replace (not override) an inherited method with one of the same name.
A6:	(a) x=60 y=40. x is passed by reference; y by value.
A7:	Include a method that performs the same operation as the operator overloading.
A8:	A class cannot be instantiated if it is abstract or if it has a private constructor.
A9:	Example event handler: private void PrintSale(object sender, SaleEvArgs e) { decimal prc= (decimal)e.saleprice; DateTime dt = (DateTime)e.date; int itemNum = (int)e.itemnum; // Now print the values }
A10:	(a) Compilation error indicating that keyword new is required on Child.amethod(int, string) because it hides the inherited method. If new is used, the code prints "Base Constructor".