DefineUninitializedData Method

ModuleBuilder.DefineUninitializedData Method

Defines an uninitialized data field in the .sdata section of the portable executable (PE) file.

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

public FieldBuilder DefineUninitializedData (
	string name,
	int size,
	FieldAttributes attributes
public FieldBuilder DefineUninitializedData (
	String name, 
	int size, 
	FieldAttributes attributes
public function DefineUninitializedData (
	name : String, 
	size : int, 
	attributes : FieldAttributes
) : FieldBuilder
Not applicable.



The name used to refer to the data. name cannot contain embedded nulls.


The size of the data field.


The attributes for the field.

Return Value

A field to reference the data.

Exception typeCondition


The length of name is zero.


size is less than or equal to zero or greater than or equal to 0x003f0000.


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


CreateGlobalFunctions has been previously called.

Static is automatically included in attributes.

The data defined by this method is not created until the CreateGlobalFunctions method is called.


Starting with the , this member no longer requires ReflectionPermission with the ReflectionPermissionFlag.ReflectionEmit flag. (See Security Issues in Reflection Emit.) To use this functionality, your application should target the . For more information, see The .NET Framework 3.5 Architecture.

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

Community Additions

© 2016 Microsoft