A few DNX Core adjustments

src/Discord.Net/DiscordClient.cs

@@ -643,11 +643,7 @@ namespace Discord
 					throw new InvalidOperationException("The client is connecting.");
 			}
 			
-#if !DNXCORE50
 			if (checkVoice && !_config.EnableVoice)
-#else
-			if (checkVoice) //Always fail on DNXCORE50
-#endif
 				throw new InvalidOperationException("Voice is not enabled for this client.");
 		}
 		private void RaiseEvent(string name, Action action)

src/Discord.Net/DiscordClientConfig.cs

@@ -29,9 +29,13 @@ namespace Discord
 		private int _voiceBufferLength = 3000;
 
 		//Experimental Features
+#if !DNXCORE50
 		/// <summary> (Experimental) Enables the voice websocket and UDP client. This option requires the opus .dll or .so be in the local lib/ folder. </remarks>
 		public bool EnableVoice { get { return _enableVoice; } set { SetValue(ref _enableVoice, value); } }
 		private bool _enableVoice = false;
+#else
+		internal bool EnableVoice => false;
+#endif
 		/// <summary> (Experimental) Enables or disables the internal message queue. This will allow SendMessage to return immediately and handle messages internally. Messages will set the IsQueued and HasFailed properties to show their progress. </summary>
 		public bool UseMessageQueue { get { return _useMessageQueue; } set { SetValue(ref _useMessageQueue, value); } }
 		private bool _useMessageQueue = false;