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InvalidCredentialException Class

The exception that is thrown when authentication fails for an authentication stream and cannot be retried.

Namespace:  System.Security.Authentication
Assembly:  System (in System.dll)

public class InvalidCredentialException : AuthenticationException

The NegotiateStream and SslStream classes throw this exception when authentication fails. This exception indicates that the underlying stream is not in a valid state and you cannot retry the authentication using the NegotiateStream or SslStream instance. If you can retry the authentication, an AuthenticationException is thrown instead of the InvalidCredentialException.


Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0