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

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
public WebProxy (
	String Address, 
	boolean BypassOnLocal, 
	String[] BypassList, 
	ICredentials Credentials
public function WebProxy (
	Address : String, 
	BypassOnLocal : boolean, 
	BypassList : String[], 
	Credentials : ICredentials
Not applicable.



The URI of the proxy server.


true to bypass the proxy for local addresses; otherwise, false.


An array of regular expression strings that contains the URIs of the servers to bypass.


An ICredentials instance to submit to the proxy server for authentication.

Exception typeCondition


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 Contoso.com URIs.
    string[] bypassList = new string[]{";*.Contoso.com"};
    return new WebProxy("http://contoso", 

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

Windows 98, Windows Server 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 Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

Community Additions