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FtpWebRequest.Proxy Property

Gets or sets the proxy used to communicate with the FTP server.

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

abstract Proxy : IWebProxy with get, set 
override Proxy : IWebProxy with get, set

Property Value

Type: System.Net.IWebProxy
An IWebProxy instance responsible for communicating with the FTP server.

ExceptionCondition
ArgumentNullException

This property cannot be set to a null reference (Nothing in Visual Basic).

InvalidOperationException

A new value was specified for this property for a request that is already in progress.

The Proxy property identifies the IWebProxy instance that communicates with the FTP server. The proxy is set by the system by using configuration files and the Internet Explorer Local Area Network settings. To specify that no proxy should be used, set Proxy to the proxy instance returned by the GlobalProxySelection.GetEmptyWebProxy method. For more information about automatic proxy detection, see Automatic Proxy Detection.

You must set Proxy before writing data to the request's stream or getting the response. Changing Proxy after calling the GetRequestStream, BeginGetRequestStream, GetResponse, or BeginGetResponse method causes an InvalidOperationException exception.

The FtpWebRequest class supports HTTP and ISA Firewall Client proxies.

If the specified proxy is an HTTP proxy, only the DownloadFile, ListDirectory, and ListDirectoryDetails commands are supported.

The following code example displays this property value.

No code example is currently available or this language may not be supported.

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

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