title: CFNetwork reference is missing while creating IOS Binding project using Objective Sharpie
body: <p>I would like to use TriPos IOS mobile payment gateway,i have downloaded the IOS sdk from official site "<a href="https://developer.vantiv.com/servlet/JiveServlet/download/1915-27-5158/iOS+Release+v1.4.0+triPOS+Mobile+SDK.zip" rel="nofollow noreferrer">https://developer.vantiv.com/servlet/JiveServlet/download/1915-27-5158/iOS+Release+v1.4.0+triPOS+Mobile+SDK.zip</a>".Since  that is a objective C library i cannot use that directly into my Xamarion.IOS project.I have created the binding project with the help of Objective sharpie tool using command "sharpie bind /Users/kmit/Desktop/tripossdk/triPOSMobileSDK.framework/Headers/ triPOSMobileSDK.h -sdk iphoneos12.1",it generate Apidefinition.cs and StructAndEnum.cs file with huge Error.I have solved may of the error based on the reference "<a href="https://docs.microsoft.com/en-us/xamarin/ios/platform/binding-objective-c/walkthrough?tabs=windows#create-a-xamarinios-binding-project" rel="nofollow noreferrer">https://docs.microsoft.com/en-us/xamarin/ios/platform/binding-objective-c/walkthrough?tabs=windows#create-a-xamarinios-binding-project</a>". but seems like objective sharpie missed to add CFNetwork reference so i am getting reference Error for that ,so am i missed anything ?</p>
  
  <p>I have also tried to include CFNetwork as dll reference but cannot able to find any referencable dll.</p>
  
  <p><a href="https://i.stack.imgur.com/rJzTY.jpg" rel="nofollow noreferrer">Error Reference</a></p>