Importing nested namespaces automatically in C#
Sorry if this question was asked already. 
I started studying C# and noticed that C# doesn't automatically import nested namespaces. 
I don't understand:

    using System;
should automatically import all classes contained in the System namespace right? 
So there should be no need for me to write 

    using System.Windows.Form;
I would understand if `using Windows.Form` even worked. But the compiler could not resolve it! What the hell is the point of the `using System;` before it then? 
So why does `using System;` not import `System.Windows` automatically as well as `System.Windows.Forms` - sorry if the word import is wrong here.. maybe move to global namespace is the right terminology.
Thanks in adv.
Importing nested namespaces automatically in C#
===

Sorry if this question was asked already. 
I started studying C# and noticed that C# doesn't automatically import nested namespaces. 
I don't understand:

    using System;
should automatically import all classes contained in the System namespace right? 
So there should be no need for me to write 

    using System.Windows.Form;
I would understand if `using Windows.Form` even worked. But the compiler could not resolve it! What the hell is the point of the `using System;` before it then? 
So why does `using System;` not import `System.Windows` automatically as well as `System.Windows.Forms` - sorry if the word import is wrong here.. maybe move to global namespace is the right terminology.
Thanks in adv.