fix for crash

SocketStudy/PComm/PClient.cs

@@ -16,7 +16,7 @@ namespace PComm
 	public class PClient
 	{
 		private readonly int BUFF_SIZE = 1000 * 50; // 50kB
-		private readonly int LARGE_DATA_SIZE_THRESHOLD = 1000000; // 1MB
+		private readonly int LARGE_DATA_SIZE_THRESHOLD = 1000 * 50; // 50kB
 
 		public delegate void ClientReceivedHandler(PClient sender, PDataType dataType, byte[] data);
 		public event ClientReceivedHandler OnReceived;
@@ -103,8 +103,12 @@ namespace PComm
 			}
 		}
 
-		private int SendData(byte[] data)
+		private int SendByProtocol(PDataType dataType, byte[] data)
 		{
+
+			byte[] type = BitConverter.GetBytes((int)dataType);
+			SendToSocket(type);
+
 			byte[] isCompressed;
 			byte[] toSendData;
 			// 데이터 크기 100B 이하 또는 50MB 이상 압축하지 않음 (CPU 부하시간 더 큼)
@@ -135,8 +139,7 @@ namespace PComm
 
 		public int Send(PDataType dataType, byte[] data)
 		{
-			socket.Send(BitConverter.GetBytes((int)dataType), SocketFlags.None);
-			return SendData(data);
+			return SendByProtocol(dataType, data);
 		}
 
 		private void AcceptCallback(IAsyncResult ar)