Which remobjects.sdk.dll for VS2015 Xamarin Cross Platform App?

Which version of the remobjects.sdk.dll i need for the portable-project of a xamarin.forms cross platform-project?

My problem: if i use the PortableLibrary of RemObjects.SDK.dll there is no “IpTcpClientChannel” that i use in other projects.

What can i do?

Portable Library supports only Http client channel.
You can add one more server channel to the server app to expose its interfaces over Http.