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SecurityNegotiationException Class

Indicates that an error occurred while negotiating the security context for a message.

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

<SerializableAttribute> _
Public Class SecurityNegotiationException _
	Inherits CommunicationException
Dim instance As SecurityNegotiationException

This exception can happen in the following cases:

  • While negotiating the initial security context. The exact error depends on the negotiation technology used: either Simple and Protected GSS-API Negotiation (SPNEGO) or TLSNEGO. For more information, see Security Protocols.

  • While establishing a security session on top of an initial security context.

  • During key renewal for an existing security session.

Security negotiation errors can occur as part of the Spnego/Sslnego security protocol or as part of the SecureConversation protocol.


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 Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC

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

.NET Compact Framework

Supported in: 3.5