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TorWebClient/TorClient/Extensions/Extensions.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net.Sockets;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Tor.Extensions
+{
+
+  public static class Extensions
+  {
+    /// <summary>
+		/// Determine if socket is connected
+    /// "Poll" returns true if
+    /// connection is closed, reset, terminated or pending (meaning no active connection)
+    /// connection is active and there is data available for reading
+    /// "Available" returns number of bytes available for reading
+    /// if both are true:
+    /// There is no data available to read so connection is not active
+		/// </summary>
+		/// <param name="socket">The socket</param>
+    public static bool IsConnected(this Socket socket)
+    {
+      try
+      {
+        bool part1 = socket.Poll(1000, SelectMode.SelectRead);
+        bool part2 = (0 == socket.Available);
+        return part1 && part2 ? false : true;
+      }
+      catch(Exception)
+      {
+        return false;
+      }
+    }
+  }
+}