This documentation is archived and is not being maintained.

TypeBuilder.DefineField Method (String, Type, FieldAttributes)

Adds a new field to the type, with the given name, attributes, and field type.

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

public FieldBuilder DefineField (
	string fieldName,
	Type type,
	FieldAttributes attributes
public FieldBuilder DefineField (
	String fieldName, 
	Type type, 
	FieldAttributes attributes
public function DefineField (
	fieldName : String, 
	type : Type, 
	attributes : FieldAttributes
) : FieldBuilder
Not applicable.



The name of the field. fieldName cannot contain embedded nulls.


The type of the field


The attributes of the field.

Return Value

The defined field.

Exception typeCondition


The length of fieldName is zero.


type is System.Void.


A total size was specified for the parent class of this field.


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


The type was previously created using CreateType.

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