What is the purpose of a contract in WCF? Name different types.

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ICSM Computer · Answer

In WCF, a contract defines what a service does — essentially the
interface between the client and the service. It specifies the operations (methods), data structures, messages, and faults the service supports.
Purpose of a Contract in WCF
Describes the service functionality to clients.Allows WCF to generate service metadata (WSDL).Defines how data is structured and communicated.Enables separation of implementation from definition.
Types of Contracts in WCF
Service Contract
Defines the operations the service exposes.Applied to interfaces or classes using [ServiceContract] and 
[OperationContract].
Data Contract
Defines how complex data types are serialized and deserialized.Uses [DataContract] and [DataMember].
Message Contract
Provides full control over the SOAP message format (headers, body, etc.).Used when you need to customize message structure.
Fault Contract
Defines structured error information sent to clients.Uses [FaultContract] to declare expected faults.
Summary
A contract defines the behavior, data, and communication structure of a WCF service.Main types: Service, Data, Message, and
Fault contracts.Contracts enable WCF to enforce a strong and flexible service interface model.

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What is the purpose of a contract in WCF? Name different types.

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Purpose of a Contract in WCF

Types of Contracts in WCF

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