diff --git a/SimpleTcp/Client/BaseTcpClient.cs b/SimpleTcp/Client/BaseTcpClient.cs
index f14c1f5..ab1abb0 100644
--- a/SimpleTcp/Client/BaseTcpClient.cs
+++ b/SimpleTcp/Client/BaseTcpClient.cs
@@ -38,7 +38,14 @@ public abstract class BaseTcpClient : IDisposable
         #endregion
 
         #region Public Member
+        /// <summary>
+        /// Called when connecting to the server.
+        /// </summary>
 		public event ConnectedHandler Connected;
+
+        /// <summary>
+        /// Called when the connection with the server is lost.
+        /// </summary>
 		public event DisconnectedHandler Disconnected;
         #endregion
 
diff --git a/SimpleTcp/Client/RawTcpClient.cs b/SimpleTcp/Client/RawTcpClient.cs
index ea2a46a..0099ba2 100644
--- a/SimpleTcp/Client/RawTcpClient.cs
+++ b/SimpleTcp/Client/RawTcpClient.cs
@@ -12,11 +12,21 @@ namespace SimpleTcp.Client
     public class RawTcpClient : BaseTcpClient
     {
         #region Public Member
+        /// <summary>
+        /// Called when data is received.
+        /// </summary>
         public event DataReceivedEventHandler DataReceived;
         #endregion
 
         #region Public Methods
         #region Constructor
+
+        /// <summary>
+        /// RawTcpClient
+        /// </summary>
+        /// <param name="host">The name of the remote host</param>
+        /// <param name="port">The port number of the remote host</param>
+        /// <param name="timeout">connection timeout (ms)</param>
         public RawTcpClient(string host = null, int port = -1, int timeout = 3000) : base(host, port, timeout) { }
         #endregion
 
@@ -30,6 +40,11 @@ public RawTcpClient(string host = null, int port = -1, int timeout = 3000) : bas
             return base.ReadExisting();
         }
 
+        /// <summary>
+        /// If exist return readed byte
+        /// If not exist return -1
+        /// </summary>
+        /// <returns></returns>
         new public int ReadByte()
         {
             return base.ReadByte();
diff --git a/SimpleTcp/Server/BaseTcpServer.cs b/SimpleTcp/Server/BaseTcpServer.cs
index 46f2691..501f4f7 100644
--- a/SimpleTcp/Server/BaseTcpServer.cs
+++ b/SimpleTcp/Server/BaseTcpServer.cs
@@ -36,7 +36,15 @@ public IClient[] Clients
         /// </summary>
         public int Port { get => (tcpListener?.LocalEndpoint as IPEndPoint)?.Port ?? -1; }
 
-        public long TotalReceiveBytes { get; private set; }
+        /// <summary>
+        /// Get Total received bytes count
+        /// </summary>
+        public long TotalReceivedBytes { get; private set; }
+
+        /// <summary>
+        /// Get Total sended bytes count
+        /// </summary>
+        public long TotalSendedBytes { get; private set; }
 		#endregion
 
 		#region Private Member
@@ -50,12 +58,24 @@ public IClient[] Clients
 		#endregion
 
         #region Public Member
+        /// <summary>
+        /// Client connected event handler
+        /// </summary>
 		public event ClientConnectedHandler ClientConnected;
+
+        /// <summary>
+        /// Client disconnected event handler
+        /// </summary>
 		public event ClientDisconnectedHandler ClientDisconnected;
         #endregion
 
         #region Public Methods
         #region Constructor
+
+        /// <summary>
+        /// BaseTcpServer
+        /// </summary>
+        /// <param name="port">If you specify a valid port, the server starts immediately.</param>
         public BaseTcpServer(int port = -1)
         {
             if(port > 0)
@@ -65,6 +85,10 @@ public BaseTcpServer(int port = -1)
         }
         #endregion
 
+        /// <summary>
+        /// Start tcp server
+        /// </summary>
+        /// <param name="port">Server port</param>
         public void Start(int port)
 		{
             lock (syncObject)
@@ -89,6 +113,9 @@ public void Start(int port)
             }
 		}
 
+        /// <summary>
+        /// Stop tcp server
+        /// </summary>
 		public void Stop()
 		{
             lock (syncObject)
@@ -137,7 +164,7 @@ private void AcceptTcpClientCallback(IAsyncResult ar)
 				TcpClient tcpClient = tcpListener.EndAcceptTcpClient(ar);
 				if(tcpClient != null) // new client connected
 				{
-					Connection connection = new Connection(tcpClient);
+					Connection connection = new Connection(this, tcpClient);
 					lock(syncObject)
 					{
 						connections.Add(connection);
@@ -185,22 +212,20 @@ private void DisconnectedCallback(Connection connection)
 
 		private void DataReceivedCallback(Connection connection, int receivedSize)
 		{
-            TotalReceiveBytes += receivedSize;
+            TotalReceivedBytes += receivedSize;
 			OnDataReceived(connection, receivedSize);
 		}
 		#endregion
-		
 
 		protected class Connection : IClient
 		{
 			#region Properties
 			public TcpClient TcpClient { get; private set; }
 			public IPEndPoint IPEndPoint { get => TcpClient?.Client?.RemoteEndPoint as IPEndPoint; }
-			public NetworkStream NetworkStream { get { try { return TcpClient?.GetStream(); } catch { return null; } } }
 
-			public int BytesToRead { get => ringBuffer.Count; }
+			public int BytesToRead { get => _ringBuffer.Count; }
 			public long DropBytes { get; private set; } = 0;
-            public long SendBytes { get; private set; } = 0;
+            public long SendedBytes { get; private set; } = 0;
             public long ReceivedBytes { get; private set; } = 0;
 			#endregion
 
@@ -209,69 +234,77 @@ protected class Connection : IClient
 
 			#region Private Members
 			private object syncObject = new object();
-			private byte[] buffer;
-			private RingBuffer ringBuffer;
-			private DataReceivedCallback dataReceived;
-			private DisconnectedCallback disconnected;
+			private byte[] _buffer;
+			private RingBuffer _ringBuffer;
+			private DataReceivedCallback _dataReceived;
+			private DisconnectedCallback _disconnected;
+            private BaseTcpServer _baseTcpServer;
 			#endregion
 
-			public Connection(TcpClient tcpClient)
+			public Connection(BaseTcpServer baseTcpServer, TcpClient tcpClient)
 			{
 				TcpClient = tcpClient;
-				buffer = new byte[tcpClient.ReceiveBufferSize];
-				ringBuffer = new RingBuffer(tcpClient.ReceiveBufferSize);
+				_buffer = new byte[tcpClient.ReceiveBufferSize];
+				_ringBuffer = new RingBuffer(tcpClient.ReceiveBufferSize);
+                _baseTcpServer = baseTcpServer;
 			}
 
 			public void BeginRead(DataReceivedCallback dataReceivedCallback, DisconnectedCallback disconnectedCallback)
 			{
-				dataReceived = dataReceivedCallback;
-				disconnected = disconnectedCallback;
-				NetworkStream?.BeginRead(buffer, 0, buffer.Length, new AsyncCallback(ReadCallback), this);
+				_dataReceived = dataReceivedCallback;
+				_disconnected = disconnectedCallback;
+                try
+                {
+                    TcpClient?.GetStream()?.BeginRead(_buffer, 0, _buffer.Length, new AsyncCallback(ReadCallback), this);
+                }
+                catch
+                {
+                    _disconnected?.Invoke(this);
+                }
 			}
 
 			private void ReadCallback(IAsyncResult ar)
 			{
 				if (ar.AsyncState is Connection connection)
 				{
-					int readSize = 0;
+					int readSize;
 					try
 					{
-						readSize = connection.NetworkStream?.EndRead(ar) ?? 0;
+						readSize = connection.TcpClient.GetStream()?.EndRead(ar) ?? 0;
 					}
-					catch { }
+					catch { readSize = 0; }
 
 					if (readSize == 0) // client disconnected when readSize is zero
 					{
-						disconnected?.Invoke(this);
+						_disconnected?.Invoke(this);
 					}
 					else
 					{
-						int writeBytes = ringBuffer.Write(buffer, 0, readSize);
+						int writeBytes = _ringBuffer.Write(_buffer, 0, readSize);
 						if(writeBytes < readSize)
 						{
 							DropBytes += (readSize - writeBytes);
 						}
                         ReceivedBytes += readSize;
-
-						dataReceived?.Invoke(this, readSize);
-						BeginRead(dataReceived, disconnected);
+						_dataReceived?.Invoke(this, readSize);
+						BeginRead(_dataReceived, _disconnected);
 					}
 				}
 			}
 
 			public int Read(byte[] buffer, int offset, int count)
 			{
-				return ringBuffer.Read(buffer, offset, count);
+				return _ringBuffer.Read(buffer, offset, count);
 			}
 
 			public byte[] ReadExisting()
 			{
-                return ringBuffer.ReadExisting();
+                return _ringBuffer.ReadExisting();
 			}
 
 			public int ReadByte()
 			{
-				return ringBuffer.ReadByte();
+				return _ringBuffer.ReadByte();
 			}
 
 			public void Write(byte[] buffer, int offset, int count)
@@ -280,18 +313,19 @@ public void Write(byte[] buffer, int offset, int count)
                 {
                     lock (syncObject)
                     {
-                        NetworkStream networkStream = NetworkStream;
+                        NetworkStream networkStream = TcpClient?.GetStream();
                         if (networkStream.CanWrite)
                         {
                             networkStream.Write(buffer, offset, count);
                             networkStream.Flush();
-                            SendBytes += count;
+                            SendedBytes += count;
+                            _baseTcpServer.TotalSendedBytes += count;
                         }
                     }
                 }
                 catch
                 {
-                    disconnected?.Invoke(this);
+                    _disconnected?.Invoke(this);
                 }
 			}
 
diff --git a/SimpleTcp/Server/IClient.cs b/SimpleTcp/Server/IClient.cs
index 555a3fb..689c64f 100644
--- a/SimpleTcp/Server/IClient.cs
+++ b/SimpleTcp/Server/IClient.cs
@@ -10,12 +10,37 @@ namespace SimpleTcp.Server
 {
 	public interface IClient
 	{
+        /// <summary>
+        /// Client
+        /// </summary>
 		TcpClient TcpClient { get; }
+
+        /// <summary>
+        /// The client's address.
+        /// </summary>
 		IPEndPoint IPEndPoint { get; }
+
+        /// <summary>
+        /// Gets the number of bytes of data in the receive buffer.
+        /// </summary>
 		int BytesToRead { get; }
+
+        /// <summary>
+        /// The data in the receive buffer overflowed to get the number of bytes lost.
+        /// </summary>
 		long DropBytes { get; }
-        long SendBytes { get; }
+
+        /// <summary>
+        /// Get the total number of bytes sent to that client.
+        /// </summary>
+        long SendedBytes { get; }
+
+        /// <summary>
+        /// Get the total number of bytes received from the client.
+        /// </summary>
         long ReceivedBytes { get; }
+
+
 		int Read(byte[] buffer, int offset, int count);
 		byte[] ReadExisting();
 		int ReadByte();
diff --git a/SimpleTcp/Server/IPacket.cs b/SimpleTcp/Server/IPacket.cs
index 03e8c3e..6c1451c 100644
--- a/SimpleTcp/Server/IPacket.cs
+++ b/SimpleTcp/Server/IPacket.cs
@@ -10,8 +10,19 @@ namespace SimpleTcp.Server
 {
     public interface IPacket
     {
+        /// <summary>
+        /// The client that sent the packet.
+        /// </summary>
         TcpClient TcpClient { get; }
+
+        /// <summary>
+        /// Address of the client that sent the packet
+        /// </summary>
 		IPEndPoint IPEndPoint { get; }
+
+        /// <summary>
+        /// Packet data
+        /// </summary>
         byte[] PacketData { get; }
     }
 }
diff --git a/SimpleTcp/Server/PacketTcpServer.cs b/SimpleTcp/Server/PacketTcpServer.cs
index a0db72f..4140523 100644
--- a/SimpleTcp/Server/PacketTcpServer.cs
+++ b/SimpleTcp/Server/PacketTcpServer.cs
@@ -23,6 +23,10 @@ public class PacketTcpServer : BaseTcpServer
         #region Public Methods
 
         #region Constructor
+        /// <summary>
+        /// PacketTcpServer
+        /// </summary>
+        /// <param name="port">If you specify a valid port, the server starts immediately.</param>
         public PacketTcpServer(int port = -1) : base(port) { }
         #endregion
 
diff --git a/SimpleTcp/Server/RawTcpServer.cs b/SimpleTcp/Server/RawTcpServer.cs
index ee018de..12ac16f 100644
--- a/SimpleTcp/Server/RawTcpServer.cs
+++ b/SimpleTcp/Server/RawTcpServer.cs
@@ -12,15 +12,44 @@ namespace SimpleTcp.Server
     public class RawTcpServer : BaseTcpServer
     {
         #region Public Member
+        /// <summary>
+        /// Called when data is received.
+        /// </summary>
 		public event DataReceivedEventHandler DataReceived;
         #endregion
 
         #region Public Methods
 
         #region Constructor
+        /// <summary>
+        /// RawTcpServer
+        /// </summary>
+        /// <param name="port">If you specify a valid port, the server starts immediately.</param>
         public RawTcpServer(int port = -1) : base(port) { }
         #endregion
 
+        /// <summary>
+        /// Send data
+        /// </summary>
+        /// <param name="tcpClient"></param>
+        /// <param name="buffer">buffer</param>
+        /// <param name="offset">offset</param>
+        /// <param name="count">count</param>
+        public void Write(TcpClient tcpClient, byte[] buffer, int offset, int count)
+        {
+            base.GetClient(tcpClient)?.Write(buffer, offset, count);
+        }
+
+        /// <summary>
+        /// Send data to all connected clinets
+        /// </summary>
+        /// <param name="buffer">buffer</param>
+        /// <param name="offset">offset</param>
+        /// <param name="count">count</param>
+        new public void WriteToAllClients(byte[] buffer, int offset, int count)
+        {
+            base.WriteToAllClients(buffer, offset, count);
+        }
         #endregion
 
         #region Protected Methods
diff --git a/SimpleTcp/SimpleTcp.csproj b/SimpleTcp/SimpleTcp.csproj
index b1ac7ed..610ab08 100644
--- a/SimpleTcp/SimpleTcp.csproj
+++ b/SimpleTcp/SimpleTcp.csproj
@@ -8,10 +8,10 @@
     <PackageProjectUrl>https://github.com/akon47/SimpleTcp</PackageProjectUrl>
     <RepositoryUrl>https://github.com/akon47/SimpleTcp</RepositoryUrl>
     <PackageTags>SimpleTcp Tcp Client Server Socket</PackageTags>
-    <PackageReleaseNotes>change .Net Frameworkd to .Net Standard</PackageReleaseNotes>
-    <AssemblyVersion>1.0.2.0</AssemblyVersion>
-    <FileVersion>1.0.2.0</FileVersion>
-    <Version>1.0.2</Version>
+    <PackageReleaseNotes>Write a class summary, fixed some bug</PackageReleaseNotes>
+    <AssemblyVersion>1.0.3.0</AssemblyVersion>
+    <FileVersion>1.0.3.0</FileVersion>
+    <Version>1.0.3</Version>
     <PackageIcon>logo.png</PackageIcon>
     <PackageIconUrl />
     <Authors>Kim Hwan</Authors>