The other day I fired up a WCF service for the “Take Control of Messages” post and to my surprise a test client opened up which felt very similar to SoapUI.

Loading & Adding the service reference (happens auto-magically)

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Double-clicking on a service operation brings up the test form.

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Fill out the data elements and press invoke to test the service.

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The client was also able to support when I transitioned to a message contract. 

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After selecting the type, you can then expand the element to view it’s members.

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This is a great addition to VS and will greatly help testing services!