What calls your custom service host factory in WCF
So I am new to WCF and I have managed to get a custom ServiceHostFactory working in WCF and when I put a break point in the CreateServiceHost method and look at the call stack it says it was called by external code. It isn't that important but just for the sake of trying to work through the fog - What is that external code? 

Thanks
 
What calls your custom service host factory in WCF
===

So I am new to WCF and I have managed to get a custom ServiceHostFactory working in WCF and when I put a break point in the CreateServiceHost method and look at the call stack it says it was called by external code. It isn't that important but just for the sake of trying to work through the fog - What is that external code? 

Thanks
 