When I right click on Eval.svc within Visual Studio 2012 and view in browser, I get the following -
Eval.svc
The type \'EvalServiceLibary.Eval\',
Change the following line in your Eval.svc file from:
<%@ ServiceHost Language="C#" Debug="true" Service="EvalServiceLibary.Eval" %>
to:
<%@ ServiceHost Language="C#" Debug="true" Service="EvalServiceLibary.EvalService" %>