CLR in WCF
One important part is this (Add the service as a Web reference and not service reference):
From the next window, click on Advance (That’s because we should add the reference as a Web Reference, and not as a WCF Service Reference. The WCF Client is not supported in SQL CLR, and in SQL 2012 it doesn’t work).
Else you will need to import more .dll to your Sql Server.