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WebProxy Constructor (String, Boolean, String[], ICredentials)

Initializes a new instance of the WebProxy class with the specified URI, bypass setting, list of URIs to bypass, and credentials.

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

public WebProxy(
	string Address,
	bool BypassOnLocal,
	string[] BypassList,
	ICredentials Credentials


Type: System.String
The URI of the proxy server.
Type: System.Boolean
true to bypass the proxy for local addresses; otherwise, false.
Type: System.String[]
An array of regular expression strings that contains the URIs of the servers to bypass.
Type: System.Net.ICredentials
An ICredentials instance to submit to the proxy server for authentication.


Address is an invalid URI.

The WebProxy instance is initialized with the Address property set to a Uri instance that contains Address, the BypassProxyOnLocal property set to BypassOnLocal, the BypassList property set to BypassList, and the Credentials property set to Credentials.

The following code example demonstrates calling this constructor.

public static WebProxy CreateProxyWithCredentials(bool bypassLocal)
    // Do not use the proxy server for URIs.
    string[] bypassList = new string[]{";*"};
    return new WebProxy("http://contoso", 

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

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.