Windows Communication Foundation (WCF) services enable you to expose an application's functionality as a service that other applications can access (consume). Although you cannot create a WCF service by using Visual C# Express Edition, applications that you create with Visual C# Express Edition can consume existing WCF services. In the following example, you will learn how to set a reference to an existing WCF service.
To reference a WCF service
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On the File menu, click New Project.
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In the New Project dialog box, click Windows Forms Application, and then click OK.
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In Solution Explorer, right-click the project and then click Add Service Reference.
The Add Service Reference dialog box appears.
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In the Add Service Reference dialog box, add the URL of the WCF service.
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Click OK to add the service reference.
After you have referenced the WCF service, your application can access its methods.