MSDN Library

WebRequest.CreateHttp Method (String)

Initializes a new HttpWebRequest instance for the specified URI string.

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

public static HttpWebRequest CreateHttp(
	string requestUriString


Type: System.String
A URI string that identifies the Internet resource.

Return Value

Type: System.Net.HttpWebRequest
An HttpWebRequest instance for the specific URI string.


The request scheme specified in requestUriString is the http or https scheme.


requestUriString is null.


The caller does not have permission to connect to the requested URI or a URI that the request is redirected to.


The URI specified in requestUriString is not a valid URI.

The CreateHttp(String) method returns an instance of the HttpWebRequest class for the requestUriString.

When a URI that begins with http:// or http:// is passed in the requestUriString parameter, a HttpWebRequest is returned by CreateHttp(String). Another other scheme will throw an NotSupportedException.

The CreateHttp(String) method uses the requestUriString parameter to create a Uri instance that it passes to the new HttpWebRequest. If the method is successful, the AllowReadStreamBuffering property on the returned HttpWebRequest instance is set to false.

The .NET Framework includes support for the http:// and https:// URI schemes. Custom WebRequest descendants to handle other requests are registered with the RegisterPrefix method. The Create(String) method can be used to create a descendant of the WebRequest class for other schemes.

Platform Notes

Silverlight for Windows Phone Silverlight for Windows Phone

This member is present to support the .NET Compact Framework infrastructure in Silverlight for Windows Phone, and it is not intended to be used in your application code.


Supported in: 5, 4

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Windows Phone OS 7.0

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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