WebRequest.Create Method (String)
Initializes a new WebRequest instance for the specified URI scheme.
Assembly: System (in System.dll)
The request scheme specified in requestUriString has not been registered.
requestUriString is a null reference (Nothing in Visual Basic).
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.
For example, when a URI beginning with http:// or https:// is passed in requestUri, an HttpWebRequest is returned by Create. If a URI beginning with ftp:// is passed instead, the Create method will return a FileWebRequest instance. If a URI beginning with file:// is passed instead, the Create method will return a FileWebRequest instance.
The pre-registered reserve types already registered include the following:
This member outputs trace information when you enable network tracing in your application. For more information, see Network Tracing.
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.