Initial commit

Conversion of the UWP app into a .NET Core app for portability. Requires .NET Core 2.0 and C# 7.1

ExtensionMethods.cs

@@ -0,0 +1,14 @@
+using System;
+using System.Net.Sockets;
+
+namespace ScreenLogicConnect
+{
+    static class ExtensionMethods
+    {
+        public static void SendHLMessage(this NetworkStream stream, Messages.HLMessage msg)
+        {
+            var arr = msg.asByteArray();
+            stream.Write((byte[])(Array)arr, 0, arr.Length);
+        }
+    }
+}