I have generated the C# and the C# .NET 2.0 clients, the I did the build to get the dll in the bin folder.
As soon as I put this in a Xamarin Android example project and I do a http call I get this error:

W/SWAGGER (21249): Exception when calling DefaultApi.AlbumGetGet: Error calling AlbumGetGet: Error: SecureChannelFailure (The authentication or decryption has failed.) 

I'm not sure if this is related to mono or to the way the swagger auto generated client is using TLS in the http module, since the calls are over https.