Is there a way to update the version of Mono in Unity?
Mono 2.6.x is currently included in Unity but I need a later version than 2.7.x.
I need System.ServiceModel.OperationContext.IncomingMessageProperties but System.ServiceModel.Channels.MessageProperties and System.ServiceModel.Channels.MessageHeaders aren’t implemented in Mono until version 2.7.x. http://stackoverflow.com
Its unlikely that Unity will upgrade to 2.7.
If the major effort for an upgrade happen then to something thats new, not a “detail enhancement”, so 2.8 or 2.10.
Also, your situation is only potentially a deal breaker. Cause if you use anything but windows / osx standalone, those namespaces aren’t available anyway as far as I recall.