C#-ified

Converted as much ugly code as I could find into appropriate C#-friendly versions. For example, all the manual ByteHelper stuff, buffer index tracking, etc. are now BinaryWriters/BinaryReaders. Also cleaned up a bunch of getter and setter methods to use C# properties.

There's still more to be done here, but this greatly simplifies the code for reading and comprehension.

ExtensionMethods.cs

@@ -1,5 +1,7 @@
-using System;
+using ScreenLogicConnect.Messages;
+using System.IO;
 using System.Net.Sockets;
+using System.Text;
 
 namespace ScreenLogicConnect
 {
@@ -8,7 +10,33 @@ namespace ScreenLogicConnect
         public static void SendHLMessage(this NetworkStream stream, Messages.HLMessage msg)
         {
             var arr = msg.asByteArray();
-            stream.Write((byte[])(Array)arr, 0, arr.Length);
+            System.Diagnostics.Debug.WriteLine($"  sent {arr.Length}");
+            stream.Write(arr, 0, arr.Length);
+        }
+
+        public static void WritePrefixLength(this BinaryWriter bw, string val)
+        {
+            bw.Write(val.Length);
+            bw.Write(Encoding.ASCII.GetBytes(val));
+            bw.Write(new byte[HLMessageTypeHelper.alignToNext4Boundary(val.Length)]);
+        }
+
+        public static void WritePrefixLength(this BinaryWriter bw, byte[] val)
+        {
+            bw.Write(val.Length);
+            bw.Write(val);
+        }
+
+        public static void Write(this BinaryWriter bw, HLTime hlTime)
+        {
+            bw.Write(hlTime.year);
+            bw.Write(hlTime.month);
+            bw.Write(hlTime.dayOfWeek);
+            bw.Write(hlTime.day);
+            bw.Write(hlTime.hour);
+            bw.Write(hlTime.minute);
+            bw.Write(hlTime.second);
+            bw.Write(hlTime.millisecond);
         }
     }
 }