Value

A System.Net.WebHeaderCollection containing the name/value pairs of the headers for the current instance.

Exceptions

Type	Reason
InvalidOperationException	A set operation was requested but data has already been written to the request data stream.

Remarks

The following table lists the HTTP headers that cannot be set using the collection returned by this property.

Header	Set by
Accept	HttpWebRequest.Accept .
Connection	HttpWebRequest.Connection . HttpWebRequest.KeepAlive.
Content-Length	HttpWebRequest.ContentLength.
Content-Type	HttpWebRequest.ContentType.
Expect	HttpWebRequest.Expect.
Date	Set by the system to the current date.
Host	Set by the system to the current host information.
Range	HttpWebRequest.AddRange(int, int) .
Referer	HttpWebRequest.Referer.
Transfer-Encoding	HttpWebRequest.TransferEncoding. HttpWebRequest.SendChunked.
User-Agent	HttpWebRequest.UserAgent.

Note: This property overrides WebRequest.Headers.

Requirements

Namespace: System.Net
Assembly: System (in System.dll)
Assembly Versions: 1.0.5000.0, 2.0.0.0