Information
The topic you requested is included in another documentation set. For convenience, it's displayed below. Choose Switch to see the topic in its original location.

NegotiateStream.AuthenticateAsClient Method ()

Note: This method is new in the .NET Framework version 2.0.

Called by clients to authenticate the client, and optionally the server, in a client-server connection.

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

public virtual void AuthenticateAsClient ()
public void AuthenticateAsClient ()
public function AuthenticateAsClient ()

Exception typeCondition

AuthenticationException

The authentication failed. You can use this object to retry the authentication.

InvalidCredentialException

The authentication failed. You can use this object to retry the authentication.

ObjectDisposedException

This object has been closed.

InvalidOperationException

Authentication has already occurred.

- or -

This stream was used previously to attempt authentication as the server. You cannot use the stream to retry authentication as the client.

The authentication uses the client's DefaultCredentials. No Service Principal Name (SPN) is specified for the server. The impersonation level is Identification, the security level is EncryptAndSign, and mutual authentication is requested. The NegotiateStream class will construct the SPN used for mutual authentication.

When authentication succeeds, you must check the IsEncrypted and IsSigned properties to determine what security services are used by the NegotiateStream. Check the IsMutuallyAuthenticated property to determine whether mutual authentication occurred.

If the authentication fails, you receive an AuthenticationException or an InvalidCredentialException. In this case, you can retry the authentication with a different credential.

Windows 98, Windows 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 .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0
Was this page helpful?
(1500 characters remaining)
Thank you for your feedback

Community Additions

Show:
© 2014 Microsoft