Namespaces and subnamespaces in C#

Question

begginers question about C#.

In every program I have to include several namespaces, like:

using System;
using System.Collections.Generic;
using Syste         


        

Answer 1

Imagine these namespaces with these classes (the last name is a class):

• A.B.Class1
• A.Class2

Now you have the following:

using A - allows you to refer to Class2 directly... but not to Class1.

using A.B - allows you to refer to Class1 directly but not to Class2.

If you want to refer to both classes directly in your code, you need both usings.