The topic you requested is included in another documentation set. For convenience, it's displayed below. Choose Switch to see the topic in its original location.

TypeBuilder.DefineNestedType Method (String, TypeAttributes, Type, Type[])

Defines a nested type, given its name, attributes, the type that it extends, and the interfaces that it implements.

Namespace: System.Reflection.Emit
Assembly: mscorlib (in mscorlib.dll)

public TypeBuilder DefineNestedType (
	string name,
	TypeAttributes attr,
	Type parent,
	Type[] interfaces
/** @attribute ComVisibleAttribute(true) */ 
public TypeBuilder DefineNestedType (
	String name, 
	TypeAttributes attr, 
	Type parent, 
	Type[] interfaces
public function DefineNestedType (
	name : String, 
	attr : TypeAttributes, 
	parent : Type, 
	interfaces : Type[]
) : TypeBuilder
Not applicable.



The short name of the type. name cannot contain embedded nulls.


The attributes of the type.


The type that the nested type extends.


The interfaces that the nested type implements.

Return Value

The defined nested type.

Exception typeCondition


The nested attribute is not specified.


This type is sealed.


This type is an array.


This type is an interface, but the nested type is not an interface.


The length of name is zero.


name is a null reference (Nothing in Visual Basic).


An element of the interfaces array is a null reference (Nothing in Visual Basic).

This method can be used to create nested types even after the CreateType method has been called on the enclosing type.

The nested type needs to be complete before you can reflect on it using GetMembers, GetNestedType, or GetNestedTypes.

See the description of CreateType for the order in which nested types and nesting types should be completed.

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0
Was this page helpful?
(1500 characters remaining)
Thank you for your feedback

Community Additions

© 2014 Microsoft