libXXX.linkwith.cs file is not created in Xamarin.iOS Binding Project

Hello

I am trying to create a Binding project, by this manual: http://docs.xamarin.com/guides/ios/advanced_topics/binding_objective-c_libraries#APIdefinition I have created a new Xamarin.iOS Binding Project, in Visual Studio 2012, under Windows 7. I got the files [ApiDefinition.cs, StructsAndEnums.cs] as decribed. Then I added an existing file into the project named [libdtdev.a]. this is an Objectiev-C file. The manual say that: Studio will add two files: the .a file and an automatically populated C# file that contains information about what the native library contains - which should be "libdtdev.linkwith.cs", but I don't get this file. Maybe I have to add the file in some other waty than [right click on the project --> Add --> Existing Item...].

please let me know what do I do wrong.

Thanks, Eyal