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CredentialCache.GetCredential Method (String, Int32, String)

Returns the NetworkCredential instance associated with the specified host, port, and authentication protocol.

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

public NetworkCredential GetCredential (
	string host,
	int port,
	string authenticationType
public final NetworkCredential GetCredential (
	String host, 
	int port, 
	String authenticationType
public final function GetCredential (
	host : String, 
	port : int, 
	authenticationType : String
) : NetworkCredential
Not applicable.



A String that identifies the host computer.


A Int32 that specifies the port to connect to on host.


A String that identifies the authentication scheme used when connecting to host. See Remarks.

Return Value

A NetworkCredential or, if there is no matching credential in the cache, a null reference (Nothing in Visual Basic).

Exception typeCondition


host is a null reference (Nothing in Visual Basic).


authType is a null reference (Nothing in Visual Basic).


authType not an accepted value. See Remarks.


host is equal to the empty string ("").


port is less than zero.

This method searches the CredentialCache and returns the NetworkCredential instance for the specified host, port, and authorization type. The host, port, and authType values passed to this method are case-insensitively compared to the values specified when the credential was added to the CredentialCache using the Add methods.

The supported values for authType are "NTLM", "Digest", "Kerberos", and "Negotiate".

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, 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