尖括号在C#中的类名称上有什么作用? [英] What does angle brackets do on class names in C#?

问题描述

例如，我知道如何使用 List< T> 并确定该收藏集的内容.那就是T出现的地方.但是我不确定我是否完全理解括号.

I know how you can use List<T> for example and decide what that collection is holding. That's where T comes in. But I'm not sure I understand the brackets fully.

如果我创建一个课程...

If I create a class...

class MyClass<int> { }

或者代替int，我可以使用T或对象或字符串或其他任何东西.这意味着什么?它会自动变成收藏吗?

Or instead of int I could use T or object or string or whatever. What does that mean? Does it turn into a collection automatically?

推荐答案

泛型类允许类成员使用类型参数.通过添加类型参数，以与泛型方法相同的方式定义它们.在班级名称之后.

Generic classes allow class members to use type parameters. They are defined in the same way as generic methods, by adding a type parameter after the class name.

class Point<T>
{
  public T x, y;
}

要从泛型类实例化对象，将使用标准符号，但要在两个类名之后指定type参数.请注意，与泛型方法相反，泛型类必须始终使用显式指定的类型参数实例化.

To instantiate an object from the generic class the standard notation is used, but with the type argument specified after both class names. Note that in contrast to generic methods, a generic class must always be instantiated with the type argument explicitly specified.

Point<short> p = new Point<short>();

参考: http://www.pvtuts.com/csharp/csharp-generics

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