10.2.6 Nested types
Visual Studio .NET 2003
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.
In the example
using System;
class A
{
class B
{
static void F() {
Console.WriteLine("A.B.F");
}
}
}
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.
