12. Delegates and Lambda Expressions
Previous chapters discussed extensively how to create classes to encapsulate data and operations on data. As you create more and more classes, you will see common patterns in the relationships among them. One common pattern is to pass an object to a method solely so that the method can, in turn, call a method on the object. For example, if you pass to a method a reference to
IComparer<int>, odds are good that the called method will itself call the
Compare() method on the object you provided. In this case, the interface is nothing more than a way to pass a reference to a single method that can be invoked. It seems unnecessary to have to define a new interface every time you want to pass a method around. In ...