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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


Type: System.String
A String that identifies the host computer.
Type: System.Int32
A Int32 that specifies the port to connect to on host.
Type: System.String
A String that identifies the authentication scheme used when connecting to host. See Remarks.

Return Value

Type: System.Net.NetworkCredential
A NetworkCredential or, if there is no matching credential in the cache, null.


ICredentialsByHost.GetCredential(String, Int32, String)


host is null.


authType is null.


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".

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.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.