<?xml version="1.0"?> <clause number="17.2.6" title="Nested types"> <paragraph>A type declared within a class or struct is called a nested type. A type that is declared within a compilation unit or namespace is called a non-nested type. <example>[Example: In the following example: <code_example><![CDATA[ using System; class A { class B { static void F() { Console.WriteLine("A.B.F"); } } } ]]></code_example>class B is a nested type because it is declared within class A, and class A is a non-nested type because it is declared within a compilation unit. end example]</example> </paragraph> </clause>