I have a WCF project and when I run it sometimes it lunch the WCF Test and sometimes it does not.
How can I set the WCF Test Client to always be displayed ?
Have look at this article from the WCF Tools Team Blog
The link in MLF's answer does contain good information, and is definitely worth a read. However, it took me a while to find the specific answer I was looking for, which is about halfway down the page:
If you set the focus on the .svc or .xamlx file in Solution Explorer, WCF Test Client will start when pressing F5.
This still holds true in Visual Studio 2015.
来源：https://stackoverflow.com/questions/7805818/how-to-set-that-the-wcf-test-client-will-run-every-time-the-service-is-running