How to bind tingyunApp.framework to C# binding project?

[TonyScript]

You can click http://download.tingyun.com/tingyunapp/ios_agent/nbs-newlens-ios-2.5.0.zip to download the framework, BTW, I've tried many many times to make the binding, but there still some problems, like "The type or namespace name `NSURLRequest' could not be found. Are you missing an assembly reference? (CS0246) " OR "Error: No API definition file specified. " So I wonder can anyone get this thing done???

Best wishes.