What is a List<> ?And how to manipulate its items?

[waterharbin]

Hello,with the help of a matster of this forum,I meet List as container of my Point3ds.But I still not know how to manipulate its items.For example,If I want to get the second and the sixth items of this List,How can I do that?

[Irvin]

HI hello,

Please take a look a the following link.

http://msdn.microsoft.com/en-us/library/0ebtbkkc.aspx

Think this might help you with your problem.

Kind regards,

Irvin

[jeff]

You can grab them using a index ListName[2] for example.

A quick dirty explaination is generic list are like templates.

The class List<T> will replace all occurences of T(which is a place holder) with Point3d in your example.

If you want to see the benefits research collections in the System.Collections like ArrayList and see how their methods use objects in thier parameters and must use boxing and unboxing.