2 <clause number="16" title="Namespaces">
3 <paragraph>C# programs are organized using namespaces. Namespaces are used both as an "internal" organization system for a program, and as an "external" organization system-a way of presenting program elements that are exposed to other programs. </paragraph>
4 <paragraph>Using-directives (<hyperlink>16.3</hyperlink>) are provided to facilitate the use of namespaces. </paragraph>