WebResponse.ContentLength Property

When overridden in a descendant class, gets or sets the content length of data being received.

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

Public Overridable Property ContentLength As Long
Dim instance As WebResponse
Dim value As Long

value = instance.ContentLength

instance.ContentLength = value
/** @property */
public long get_ContentLength ()

/** @property */
public void set_ContentLength (long value)

public function get ContentLength () : long

public function set ContentLength (value : long)

Property Value

The number of bytes returned from the Internet resource.

Exception typeCondition


Any attempt is made to get or set the property, when the property is not overridden in a descendant class.

The ContentLength property contains the length, in bytes, of the response from the Internet resource. For request methods that contain header information, the ContentLength does not include the length of the header information.


The WebResponse class is an abstract class. The actual behavior of WebResponse instances at run time is determined by the descendant class returned by WebRequest.GetResponse. For more information about default values and exceptions, please see the documentation for the descendant classes, such as HttpWebResponse and FileWebResponse.

The following example uses the ContentLength property to obtain the Length of the resource returned.

' Create a 'WebRequest' with the specified url.     
Dim myWebRequest As WebRequest = WebRequest.Create("www.contoso.com")

' Send the 'WebRequest' and wait for response.
Dim myWebResponse As WebResponse = myWebRequest.GetResponse()

' The ContentLength and ContentType received as headers in the response object are also exposed as properties.
   ' These provide information about the length and type of the entity body in the response.
Console.WriteLine(ControlChars.Cr + "Content length :{0}, Content Type : {1}", myWebResponse.ContentLength, myWebResponse.ContentType)

// Create a 'WebRequest' with the specified url.
WebRequest myWebRequest = WebRequest.Create("http://www.contoso.com");
// Send the 'WebRequest' and wait for response.
WebResponse myWebResponse = myWebRequest.GetResponse();
// Display the content length and content type received as headers 
// in the response object.
Console.WriteLine("\nContent length :{0}, Content Type : {1}", 
// Release resources of response object.

Windows 98, Windows 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 .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, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0