Added missing files

Lidgren.Network/NetOutgoingMessage.Stream.cs

@@ -0,0 +1,52 @@
+using System;
+using System.IO;
+
+namespace Lidgren.Network
+{
+	public partial class NetOutgoingMessage : Stream
+	{
+		public override bool CanRead { get { return false; } }
+		public override bool CanSeek { get { return false; } }
+		public override bool CanWrite { get { return true; } }
+
+		public override void Flush()
+		{
+			// no op
+		}
+
+		/// <summary>
+		/// Gets the length of the stream, in bytes
+		/// </summary>
+		public override long Length
+		{
+			get { return (long)LengthBytes; }
+		}
+
+		public override long Position
+		{
+			get
+			{
+				throw new NetException("Position in bytes is not relevant since the bit count can vary");
+			}
+			set
+			{
+				throw new NetException("It's not possible to seek in this message");
+			}
+		}
+
+		public override int Read(byte[] buffer, int offset, int count)
+		{
+			throw new NetException("It's not possible to read from this message");
+		}
+
+		public override long Seek(long offset, SeekOrigin origin)
+		{
+			throw new NetException("It's not possible to seek in this message");
+		}
+
+		public override void SetLength(long value)
+		{
+			throw new NetException("It's not possible to set the length of this message");
+		}
+	}
+}