Unity 5.3.6 `UnityEngine.Experimental.Networking.UnityWebRequest' missing properties

In Unity 5.3.6 I was using the UnityWebRequest class `UnityEngine.Experimental.Networking.UnityWebRequest’ with WebPlayer and found that when building it said that it was missing many of its internal properties. Does anyone know why this is and is there a solution?

I see there is no support for that in the Unity WebPlayer. Unfortunately, the WWW class is causing memory allocations that aren’t being recovered by the operating system. Is there any other alternative?