【转载】#323

A generic classs is a class that takes one or more type parameters, which it then uses in the definition of the class. It can be thought of as a template for a class.

public class ThingContainer<TParam>
{
　　private TParam theThing;

　　public void SetThing(TParam newValue)
　　{
　　　　theThing = newValue;
　　}
}

You use a generic class by specifying a type for each of the type parameters.

ThingContainer<int> intContainer = new ThingContainer<int>();
intContainer.SetThing(5);

ThingContainer<Dog> dogContainer = new ThingContainer<Dog>();
dogContainer.SetThing(new Dog("Kirby", 5));

In this example, we use a generic class to store an object of an arbitary type. We use one version of the class to store an int and another to store a Dog. Notice that wherever we use the name of the generic class to define an instance, we need to supply a typename (e.g. int, Dog) as a parameter.

原文地址：#323 - A Generic Class is a Template for a Class