HttpListenerResponse.Headers Property

Note: This property is new in the .NET Framework version 2.0.

Gets or sets the collection of header name/value pairs returned by the server.

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

public WebHeaderCollection Headers { get; set; }
/** @property */
public WebHeaderCollection get_Headers ()

/** @property */
public void set_Headers (WebHeaderCollection value)

public function get Headers () : WebHeaderCollection

public function set Headers (value : WebHeaderCollection)

Property Value

A WebHeaderCollection instance that contains all the explicitly set HTTP headers to be included in the response.

Exception typeCondition


The WebHeaderCollection instance specified for a set operation is not valid for a response.

Response headers contain metadata information such as the date and time of the response, the identity of the responding server, and the MIME type of the data contained in the response body.

For a complete list of response headers, see the HttpResponseHeader enumeration.


If you attempt to set a Content-Length, Keep-Alive, Transfer-Encoding, or WWW-Authenticate header using the Headers property, an exception will be thrown. Use the KeepAlive or ContentLength64 properties to set these headers. You cannot set the Transfer-Encoding or WWW-Authenticate headers manually.

The following code example demonstrates displaying the headers in a WebHeaderCollection.

    // Displays the header information that accompanied a request.
public static void DisplayWebHeaderCollection(HttpListenerResponse response)
    WebHeaderCollection headers = response.Headers;
    // Get each header and display each value.
    foreach (string key in headers.AllKeys)
        string[] values = headers.GetValues(key);
        if(values.Length > 0) 
            Console.WriteLine("The values of the {0} header are: ", key);
            foreach (string value in values) 
                Console.WriteLine("   {0}", value);
            Console.WriteLine("There is no value associated with the header.");

Windows 98, Windows Server 2003, Windows XP Media Center Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0

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