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              GSF.
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| Class | Description | |
|---|---|---|
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              JsonFault | Defines a class for JSON faults. | 
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              JsonFaultHandler | Creates an error handler for encoding errors as JSON responses. | 
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              JsonFaultWebHttpBehavior | Extends WebHttpBehavior for JSON error handling. | 
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              SecurityPolicy | Represents an authorization policy that can be used by WCF services for enabling role-based security. | 
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              SelfHostingService | A base class for web service that can send and receive data over REST (Representational State Transfer) interface. | 
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              Service | Defines helper methods related to WCF-based web services. | 
| Interface | Description | |
|---|---|---|
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              IPolicyRetriever | Defines a web service interface to allow policy retrieval for cross-domain access from Silverlight and Flash browser controls. | 
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              ISelfHostingService | Defines a web service that can send and receive data over REST (Representational State Transfer) interface. |