How to Get the Working Directory of a WCF Service

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I was working on some code today in a WCF service that required me to know the directory containing the service itself. This is one of those things that by the next time I need to do it, I'll be asking myself "How did I do that last time?"

Well, here it is:

System.Web.Hosting.HostingEnvironment.ApplicationPhysicalPath;

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