Creating the HelloWorldService service contract interface

In the previous section, we created the solution and the project for the HelloWorld WCF service. From this section onwards, we will start building the HelloWorld WCF service. First, we need to create the service contract interface. For that, perform the following steps:

  1. In Solution Explorer, right-click on the HelloWorldService project and select Add | New Item… from the context menu. The Add New Item - HelloWorldService dialog window shown in the following screenshot will appear on your screen:
    Creating the HelloWorldService service contract interface
  2. On the left-hand side of the window, select Installed | Visual C# Items as the template, and from ...

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