WebHeaderCollection Class

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Contains protocol headers associated with a request or response.

Inheritance Hierarchy

System. . :: . .Object
System.Net..::..WebHeaderCollection

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

Syntax

'Declaration
Public Class WebHeaderCollection

public class WebHeaderCollection

public ref class WebHeaderCollection

type WebHeaderCollection =  class end

public class WebHeaderCollection

The WebHeaderCollection type exposes the following members.

Constructors

	Name	Description
	WebHeaderCollection	Initializes a new instance of the WebHeaderCollection class.

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Properties

	Name	Description
	AllKeys	Gets all header names (keys) in the collection.
	Count	Gets the number of headers in the collection.
	Item	Returns the string value for the header.

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Methods

	Name	Description
	Add(String)	Inserts the specified header into the collection.
	Add(String, String)	Inserts a header with the specified name and value into the collection.
	Equals(Object)	Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
	Finalize	Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
	GetHashCode	Serves as a hash function for a particular type. (Inherited from Object.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	GetValues	Gets an array of header values stored in a header.
	IsRestricted	Tests whether the specified HTTP header can be set for the request.
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	Remove	Removes the specified header from the collection.
	Set	Sets the specified header to the specified value.
	ToByteArray	Infrastructure. Converts the WebHeaderCollection to a byte array..
	ToString	Infrastructure. This method is obsolete. (Overrides Object. . :: . .ToString() () () ().)

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Remarks

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

Thread Safety

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