What are the types of contract available in WCF?
a)Service Contract:Describes what operations the client can perform.
b)Operation Contract : defines the method inside Interface of Service.
c)Data Contract:Defines what data types are passed
WCF data contracts provide a mapping function between .NET CLR types that are defined in code and XML Schemas Definitions defined by the W3C organization (www.w3c.org/) that are used for communication outside
the service.
d)Message Contract:Defines wheather a service can interact directly with messages
Message contracts describe the structure of SOAP messages sent to and from a service and enable you to inspect and control most of the details in the SOAP header and body. Whereas data contracts enable interoperability through the XML Schema Definition (XSD) standard, message contracts enable you to interoperate with any system that communicates through SOAP. Using message contracts gives you complete control over the SOAP message sent to and from a service by providing access to the SOAP headers and bodies directly. This allows use of simple or complex types to define the exact content of the SOAP parts.
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