Editing Namespace (section)

=====C#=====
Namespaces are heavily used in C# language. All .NET Framework classes are organized in namespaces, to be used more clearly and to avoid chaos. Furthermore, custom namespaces are extensively used by programmers, both to organize their work and to avoid [[naming collision]]s.
When referencing a class, one should specify either its fully qualified name, which means namespace followed by the class name:
<syntaxhighlight lang="c#">
System.Console.WriteLine("Hello World!");
int i = System.Convert.ToInt32("123");
</syntaxhighlight>

or add a '''using''' statement. This eliminates the need to mention the complete name of all classes in that namespace.

<syntaxhighlight lang="c#">
using System;

Console.WriteLine("Hello World!");
int i = Convert.ToInt32("123");
</syntaxhighlight>

In the above examples, '''System''' is a namespace, and '''Console''' and '''Convert''' are classes defined within '''System'''.

[[File:Dotnet-system-namespace-uml.svg|UML diagram with a Console and a Convert class.]]