first commit

Yapper/Net/IO/PacketBuilder.cs

@@ -0,0 +1,35 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.IO;
+
+namespace YapperClient.Net.IO
+{
+    class PacketBuilder
+    {
+        MemoryStream _ms;
+        public PacketBuilder()
+        {
+            _ms = new MemoryStream();
+        }
+
+        public void WriteOpCode(byte opcode)
+        {
+            _ms.WriteByte(opcode);
+        }
+
+        public void WriteString(string msg)
+        {
+            var msgLength = msg.Length;
+            _ms.Write(BitConverter.GetBytes(msgLength));
+            _ms.Write(Encoding.ASCII.GetBytes(msg));
+        }
+
+        public byte[] GetPacketBytes()
+        {
+            return _ms.ToArray();
+        }
+    }
+}