Implementing Custom Logic for the WCF Service

Rename the IService1.vb file to IBookService.vb; then switch to the code editor. Right-click the IService1 identifier and select Rename. Next, provide the new IBookService identifier and click OK. Visual Studio will prompt for confirmation and will rename the instances in code as well. This is important to update all references inside the project to the interface, including references inside the .svc file. Now delete the code for the CompositeType class and replace the entire code with the one shown in Listing 37.3.

LISTING 37.3 Implementing Custom Contracts

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<ServiceContract()>Public Interface IBookService    <OperationContract()>    Function ValidateBook(bookToValidate ...

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