Asp.net Source files

I'm trying to debug a WCF service in VS2013, but...it seems to keep using old versions of the c# files - I've ticked 'Make source files match code files' , I've looked in all the Asp.net Temp folders I'm aware of
(C:\Windows\Microsoft.NET\Framework64\v4.0.30319\Temporary ASP.NET Files, I'm targeting framework 4 + I'm on a 64 bit OS) and they are empty, but the code firing seems to be out of date, even though the debugger is stepping thru the current version.
Silas2Asked:
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Randy PooleCommented:
Make sure you shut down VS, then delete the files in the temporary directories of not only Framework64, but framework directory and for both the 4. and 2. versions:
Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files
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