Where is located “using System” in my computer

Question

If i have in my .cs code something like that

using System ;
using System.Net;
using System.Text;

And i want find this stuffs in some computer folder. Are there in some directories located or no?

Thanks for help

Answer 1

They refer to namespaces, not file locations. Namespaces are used to organise different classes and to make it easy to avoid conflicting names. The using directive just means you can see what namespaces are used and not need to fully qualify the namespace name of any class you use. For instance, if you didn't have using System;, then you would need to use System.String instead of just String. But you can still use the string (lowercase 's') keyword.