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WebHeaderCollection Class

Contains protocol headers associated with a request or response.

Namespace: System.Net
Assembly: System (in system.dll)

'Declaration
<SerializableAttribute> _
<ComVisibleAttribute(True)> _
Public Class WebHeaderCollection
	Inherits NameValueCollection
	Implements ISerializable
'Usage
Dim instance As WebHeaderCollection

/** @attribute SerializableAttribute() */ 
/** @attribute ComVisibleAttribute(true) */ 
public class WebHeaderCollection extends NameValueCollection implements ISerializable
SerializableAttribute 
ComVisibleAttribute(true) 
public class WebHeaderCollection extends NameValueCollection implements ISerializable
Not applicable.

The WebHeaderCollection class is generally accessed through WebRequest.Headers or WebResponse.Headers. Some common headers are considered restricted and are either exposed directly by the API (such as Content-Type) or protected by the system and cannot be changed.

The restricted headers are:

  • Accept

  • Connection

  • Content-Length

  • Content-Type

  • Date

  • Expect

  • Host

  • If-Modified-Since

  • Range

  • Referer

  • Transfer-Encoding

  • User-Agent

  • Proxy-Connection

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, 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

.NET Compact Framework

Supported in: 2.0, 1.0
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