diff --git a/Renci.SshClient/Renci.SshClient/Channels/Channel.cs b/Renci.SshClient/Renci.SshClient/Channels/Channel.cs
index ea10adb4..f45fee22 100644
--- a/Renci.SshClient/Renci.SshClient/Channels/Channel.cs
+++ b/Renci.SshClient/Renci.SshClient/Channels/Channel.cs
@@ -1,6 +1,5 @@
 
 using System;
-using System.Text;
 using System.Threading;
 using Renci.SshClient.Common;
 using Renci.SshClient.Messages;
@@ -22,10 +21,6 @@ namespace Renci.SshClient.Channels
         //private uint _maximumPacketSize = 0x4000;
         private uint _maximumPacketSize = 1024;
 
-        protected StringBuilder ChannelData { get; private set; }
-
-        protected StringBuilder ChannelExtendedData { get; private set; }
-
         public abstract ChannelTypes ChannelType { get; }
 
         public uint ClientChannelNumber { get; set; }
@@ -62,8 +57,6 @@ namespace Renci.SshClient.Channels
             }
 
             this.Session = session;
-            this.ChannelData = new StringBuilder((int)this._initialWindowSize);
-            this.ChannelExtendedData = new StringBuilder((int)this._initialWindowSize);
             this.WindowSize = this._initialWindowSize;  // Initial window size
             this.PacketSize = this._maximumPacketSize;     // Maximum packet size
         }
diff --git a/Renci.SshClient/Renci.SshClient/Channels/ChannelAsyncResult.cs b/Renci.SshClient/Renci.SshClient/Channels/ChannelAsyncResult.cs
new file mode 100644
index 00000000..e5f7bfad
--- /dev/null
+++ b/Renci.SshClient/Renci.SshClient/Channels/ChannelAsyncResult.cs
@@ -0,0 +1,33 @@
+using System;
+using System.Threading;
+
+namespace Renci.SshClient.Channels
+{
+    public class ChannelAsyncResult : IAsyncResult
+    {
+        /// <summary>
+        /// Gets or sets the channel that async result was created for.
+        /// </summary>
+        /// <value>The channel.</value>
+        internal ChannelExec Channel { get; private set; }
+
+        public int BytesReceived { get; set; }
+
+        #region IAsyncResult Members
+
+        public object AsyncState { get; internal set; }
+
+        public WaitHandle AsyncWaitHandle { get; internal set; }
+
+        public bool CompletedSynchronously { get; internal set; }
+
+        public bool IsCompleted { get; internal set; }
+
+        #endregion
+
+        internal ChannelAsyncResult(ChannelExec channel)
+        {
+            this.Channel = channel;
+        }
+    }
+}
diff --git a/Renci.SshClient/Renci.SshClient/Channels/ChannelExec.cs b/Renci.SshClient/Renci.SshClient/Channels/ChannelExec.cs
index 60372669..3a0c6c46 100644
--- a/Renci.SshClient/Renci.SshClient/Channels/ChannelExec.cs
+++ b/Renci.SshClient/Renci.SshClient/Channels/ChannelExec.cs
@@ -10,14 +10,16 @@ namespace Renci.SshClient.Channels
 
     internal class ChannelExec : Channel
     {
-        private EventWaitHandle _channelExecutionWaitHandle = new AutoResetEvent(false);
-
         private Stream _channelData;
 
         private Stream _channelExtendedData;
 
         private Exception _exception;
 
+        private ChannelAsyncResult _asyncResult;
+
+        private AsyncCallback _callback;
+
         public override ChannelTypes ChannelType
         {
             get { return ChannelTypes.Session; }
@@ -28,8 +30,24 @@ namespace Renci.SshClient.Channels
         {
         }
 
-        internal void Execute(string command, Stream output, Stream extendedOutput)
+        internal ChannelAsyncResult BeginExecute(string command, Stream output, Stream extendedOutput, AsyncCallback callback, object state)
         {
+            //  Prevent from executing BeginExecute before calling EndExecute
+            if (this._asyncResult != null)
+            {
+                throw new InvalidOperationException("");
+            }
+
+            //  Create new AsyncResult object
+            this._asyncResult = new ChannelAsyncResult(this)
+            {
+                AsyncWaitHandle = new EventWaitHandle(false, EventResetMode.ManualReset),
+                IsCompleted = false,
+                AsyncState = state,
+            };
+
+            this._callback = callback;
+
             this._channelData = output;
             this._channelExtendedData = extendedOutput;
 
@@ -44,11 +62,25 @@ namespace Renci.SshClient.Channels
                 Command = command,
             });
 
+            return _asyncResult;
+        }
 
-            this.Session.WaitHandle(this._channelExecutionWaitHandle);
+        internal void EndExecute(IAsyncResult result)
+        {
+            ChannelAsyncResult channelAsyncResult = result as ChannelAsyncResult;
+
+            if (channelAsyncResult.Channel != this)
+            {
+                throw new InvalidOperationException("Invalid IAsyncResult parameter");
+            }
+
+            //Make sure that operation completed if not wait for it to finish
+            this._asyncResult.AsyncWaitHandle.WaitOne();
 
             this.Close();
 
+            this._asyncResult = null;
+
             if (this._exception != null)
             {
                 var exception = this._exception;
@@ -61,14 +93,14 @@ namespace Renci.SshClient.Channels
         {
             base.OnChannelEof();
 
-            this._channelExecutionWaitHandle.Set();
+            this.ExecutionCompleted();
         }
 
         protected override void OnChannelFailed(uint reasonCode, string description)
         {
             base.OnChannelFailed(reasonCode, description);
             this._exception = new InvalidOperationException(string.Format("Channel failed to open. Code: {0}, Reason {1}", reasonCode, description));
-            this._channelExecutionWaitHandle.Set();
+            this.ExecutionCompleted();
         }
 
         protected override void OnChannelData(string data)
@@ -92,10 +124,14 @@ namespace Renci.SshClient.Channels
             }
         }
 
-        private void Init()
+        private void ExecutionCompleted()
         {
-            this.ChannelData.Length = 0;
-            this.ChannelExtendedData.Length = 0;
+            this._asyncResult.IsCompleted = true;
+            if (this._callback != null)
+            {
+                this._callback(this._asyncResult);
+            }
+            ((EventWaitHandle)_asyncResult.AsyncWaitHandle).Set();
         }
     }
 }
diff --git a/Renci.SshClient/Renci.SshClient/Renci.SshClient.csproj b/Renci.SshClient/Renci.SshClient/Renci.SshClient.csproj
index fe73c195..72e90aeb 100644
--- a/Renci.SshClient/Renci.SshClient/Renci.SshClient.csproj
+++ b/Renci.SshClient/Renci.SshClient/Renci.SshClient.csproj
@@ -44,6 +44,7 @@
     <Reference Include="System.Xml" />
   </ItemGroup>
   <ItemGroup>
+    <Compile Include="Channels\ChannelAsyncResult.cs" />
     <Compile Include="Security\Algorithm.cs" />
     <Compile Include="Security\Cipher.cs" />
     <Compile Include="Security\CipherAES128.cs" />
diff --git a/Renci.SshClient/Renci.SshClient/Session.cs b/Renci.SshClient/Renci.SshClient/Session.cs
index 5d2cdc0d..2558c177 100644
--- a/Renci.SshClient/Renci.SshClient/Session.cs
+++ b/Renci.SshClient/Renci.SshClient/Session.cs
@@ -27,7 +27,13 @@ namespace Renci.SshClient
             var ep = new IPEndPoint(Dns.GetHostAddresses(connectionInfo.Host)[0], connectionInfo.Port);
             var socket = new Socket(ep.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
             socket.ExclusiveAddressUse = true;
-            socket.Connect(ep);
+
+            //  Connect socket with 5 seconds timeout
+            var connectResult = socket.BeginConnect(ep, null, null);
+
+            connectResult.AsyncWaitHandle.WaitOne(1000 * 15);
+
+            socket.EndConnect(connectResult);
 
             //  Get server version from the server,
             //  ignore text lines which are sent before if any
@@ -208,9 +214,9 @@ namespace Renci.SshClient
 
         internal abstract void SendMessage(Message message);
 
-        internal void WaitHandle(EventWaitHandle waitHandle)
+        internal void WaitHandle(WaitHandle waitHandle)
         {
-            var waitHandles = new EventWaitHandle[]
+            var waitHandles = new WaitHandle[]
                 {
                     this._disconnectWaitHandle,
                     this._exceptionWaitHandle,
diff --git a/Renci.SshClient/Renci.SshClient/Shell.cs b/Renci.SshClient/Renci.SshClient/Shell.cs
index 416ae228..94db9541 100644
--- a/Renci.SshClient/Renci.SshClient/Shell.cs
+++ b/Renci.SshClient/Renci.SshClient/Shell.cs
@@ -1,4 +1,5 @@
 
+using System;
 using System.IO;
 using System.Text;
 using Renci.SshClient.Channels;
@@ -15,28 +16,41 @@ namespace Renci.SshClient
 
         public string Execute(string command)
         {
-            //var channel = new ChannelSession(this._session);
-
-            MemoryStream resultStream = new MemoryStream();
-
-
-            var channel = this._session.CreateChannel<ChannelExec>();
-
-            channel.Execute(command, resultStream, null);
-
-            return Encoding.ASCII.GetString(resultStream.ToArray());
+            return this.Execute(command, null);
         }
 
         public string Execute(string command, Stream extended)
         {
             MemoryStream resultStream = new MemoryStream();
 
-            var channel = this._session.CreateChannel<ChannelExec>();
-
-            channel.Execute(command, resultStream, extended);
+            this.Execute(command, resultStream, extended);
 
             return Encoding.ASCII.GetString(resultStream.ToArray());
         }
 
+        public void Execute(string command, Stream output, Stream extended)
+        {
+            this.EndExecute(this.BeginExecute(command, output, extended, null, null));
+        }
+
+        public IAsyncResult BeginExecute(string command, Stream output, AsyncCallback callback, object state)
+        {
+            return this.BeginExecute(command, output, null, callback, state);
+        }
+
+        public IAsyncResult BeginExecute(string command, Stream output, Stream extendedOutput, AsyncCallback callback, object state)
+        {
+            var channel = this._session.CreateChannel<ChannelExec>();
+
+            return channel.BeginExecute(command, output, extendedOutput, callback, state);
+        }
+
+        public void EndExecute(IAsyncResult asynchResult)
+        {
+            ChannelAsyncResult channelAsyncResult = asynchResult as ChannelAsyncResult;
+
+            channelAsyncResult.Channel.EndExecute(asynchResult);
+        }
+
     }
 }